Cognitive psychology Flashcards

(260 cards)

1
Q

What is cognitive psychology?

A

scientific study of how the mind encodes stores and uses information

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2
Q

What are mental representations?

A

encoded and stored information about the environment

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3
Q

What are computations?

A

the processing steps, performed on mental represenations

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4
Q

What are the 3 levels of understanding?

A
  1. computational level of analysis: understand what the mind is trying to compute and why
  2. algorithmic level of analysis: understand the rules, mechanisms, and representations the mind uses.
  3. implementational level of analysis: understand the “hardware”—that is, the brain—that physically enables the processes of human cognition.
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5
Q

What is spatial resolution?

A

ability to pinpoint where neural activity occurs

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6
Q

What is temporal resolution?

A

Ability to pinpoint when neural activity occurs

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7
Q

What is invasiveness of research methods?

A

Impact on the individual whose brain is being studied

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8
Q

What is single-cell electrode recordings (electrophysicology)?

A

Measure the electrical activity from neurons using electrodes -> action potential is all or none -> basically you are manipulating the firing rate of neuron -> manipulating it = demonstrating that neuron’s function

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9
Q

What are the pros and cons of single cell electrode recording?

A

Pro: Spatial precision: can study basic unit of processing in brain - highest possible spatial resolution

Pro: temporal precision: can measure neuron firing the instant it happens

con: Highly invasive: inserting electrodes into brain - can only insert in humans if there is clinical reason to help

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10
Q

What is intracranial recording or electrocorticography (ECoG)?

A

Putting electrodes on the surface of exposed human brain - inserting electrodes into the human brain

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11
Q

What are the pros and cons of intracranial recording or ECoG?

A

Same as electrophysciology/single cell electrode: high spatial and temporal resolution (pro) but highly invasive (con)

Con 2: placement of electrode is clinically determined not by research hypotheses

con 3: ECoG recordings are from individuals who tend to be heavily medicated to control their epileptic seizure

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12
Q

What is electroencephalography (EEG)?

A

Uses electrodes on scalp to detect and amplify global electrical activity

EEG pattern in response to a stimulus is called event-related potential - different pattern for different stimulus/levels of consciousness ect

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13
Q

What are the pros and cons of electroencephalography (EEG)?

A

Pros: High temporal precision/resolution, inexpensive compared to other neuroimaging methods, noninvasive and relatively convenient

Con: Poor spatial resolution: sums up activity across entire brain - signals from different areas mingle so hard to decipher

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14
Q

What is functional magnetic resonance imaging (fMRI)?

A

Measures and localizes blood oxygen levels throughout brain

Blood oxygen levels increases in active brain ares -> uses blood-oxygen-level-dependent (BOLD) signal to infer brain activity

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15
Q

What are the pros and cons of fMRI?

A

Pros:
- significantly better spatial resolution than any noninvasive method to study the brain
- Does not require placing of electrodes into brain or scalp -> less invasive

Cons:
- measurements are indirect
- infer activity based on increased measurements of oxygenated hemoglobin to a brain area
- accuracy limited by blood vasculature (limited spatial resolution)

  • Temporal resolution is poorer than electrophysiological methods
    • cannot offer precision due to its reliance on the rise and fall of oxygenated hemoglobin levels - happen slower than electrical currents in brain
  • Noninvasive but still many safety procedures to follow due to scanner’s high magnetic field + claustrophobia
  • another limitation, but not specific to fMRI but is relevant is reverse inference
    • illogically infer mental process (cognition or emotional) from activation of a particular brain area
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16
Q

What is transcranial magnetic stimulation (TMS)?

A

a coil is placed at strategic locations around an individual’s head -> induces magnetic field -> and influence neural activity in region under the coil

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17
Q

What are pros and cons of TMS?

A

Pros:
- Help establish causality
- Good temporal precision
- can time TMS pulse
- Provide clinical benefits for some disorders such as drug resistant depression

Cons:
- poor spatial precision and reach
- foci of TMS disruption are not well defined
- Only disrupt within 3cm of the scalp and not deeper
- It can cause discomfort when used

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18
Q

What is transcranial direct current stimulation (tDCS)?

A

involves applying a weak electrical current across the skull to modify brain activity -> increases or decreases likelihood of neurons to fire

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19
Q

What is perception?

A

Ability to recognize and interpret information from the senses

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20
Q

What is modal completion?

A

where your view of the illusory object is not obstructed, and where there is no objective boundary between the illusory object and the background (perceiving something that isn’t there in reality)

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21
Q

What is amodal completion?”

A

where you seem to perceive an object despite an apparently obstructed view

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22
Q

What is bottom up information?

A

Sensory input - what you sense

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23
Q

What is top-down information?

A

the knowledge and expectations that influence and enhance our interpretation of sensory input

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24
Q

How does top down information influences perception?

A
  1. Context
  2. Experience e.g. shadows: for depths and spatial resolution
  3. Predictions - our brain constantly make predictions of what we are going to see
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25
What is object segmentation?
visually assigning the elements of a scene to separate objects and backgrounds.
26
What is the problem of figure-ground organisation?
Don't know which side of boundary belongs to background and the other to figure - vase or people kissing picture Characteristics - figure is part of foreground - background continues behind figure - contour belong to figure
27
What are the rules the mind follows for the problem of the figure ground organisation?
Rule of enclosure: if one region iscompletely surrounded by other, surrounded region seen as figure Rule of symmetry: one region that is more symmetrical, be perceived as figure Rule of convexity: convex side be perceived as figure before concave sixe
28
What is occlusion?
refers to the fact that our views of objects are often partially blocked by other objects - our brain fills in the gap
29
What is boundary extension?
where people tend to remember pictures as having extended beyond their edges, as if their minds fill in a little bit of what the scene would have looked like had it not been cut off at its border
30
What is the inverse projection problem?
we live in a three-dimensional (3-D) world, but the input to our eyes is two-dimensional (2-D).
31
What is binocular disparity?
Close something is to you, the greater the difference between what your two eyes see
32
What are some monocular depth cues?
Linear perspective: the way parallel lines appear to move closer together and converge on single point as they recede into distance texture gradient: textural elements that are presumably of similar size appear to get smaller and more densely packed as they recede into the distance
33
What is object constancy?
recognizing objects despite their orientation.
34
What is size constancy?
the perceived sizes of object are remarkably stable despite radical differences in their image size on the retina.
35
What is low-level (early) and high-level (late) vision?
Early: objects basic feature, ie orientation, color and motion late: recognize objects, faces and scenes
36
What is agnosia and its two types?
Agnosia: inability to recognize objects apperceptive agnosia: individual have impaired early vision, cannot copy images Associate agnosia: early vision intact but inability to name objects (aka cannot recognize shit)
37
What is the view based approach to object recognition?
Match images to representations that are like a template - a representation that fully describes the shape of an object - good for simple and standardized images, harder to explain natural images where we view objects at multiple angles
38
What is the structural approach to object recognition?
Models that represent objects as sets of 3d parts standing in spatial to each other, geons.
39
What part of the brain is activated for object discrimination?
Ventral cortex/Inferior temporal cortex
40
What part of the brain is activated for landmark discrimination/location?
Posterior parietal cortex
41
What are perception and action pathways?
Perception pathway: To determine what is located where Action pathway: use perceptual information to guide ongoing action -patient with agnosia who could not determine orientation of slot but could still put card into slot perfectly
42
What is mental imagery?
act of forming a percept in mind without sensory input
43
What is aphantasia?
Unable to engage in mental imagery
44
What is the depictive explanation of mental imagery (Kosslyn's view)?
Brain represents mental images like it represents real images coming through the eyes - mental imagery like perception, mental scanning: process of mentally moving from one pt in an image to another
45
What is the propositional explanation of mental imagery (Pylyshyn's view)?
Mental images are held in a post-perceptual, abstract way, more like a linguistic description than a picture - simply "simulating" perception, not using visual imagery, imagery as epiphenomenon - smth that occurs tgt with a process of interest but is not central for its function
46
What is spatial neglect?
who cannot visually attend to objects on one side of their visual fields - left-neglect individuals will be able to describe aspects of the scene on the right-hand side only
47
What is attention?
family of cognitive mechanisms that combine to help us select, modulate, and sustain focus on information that might be most relevant for behaviour
48
What is external attention?
how we attend outwardly or select and modulate sensory information
49
What is saccades?
eye movements
50
What is overt attention?
spatial attention by moving the eyes
51
What is covert attention?
spatial attention without moving eyes
52
What is selective attention?
concentrating on certain stimuli and ignoring others in an environmnet
53
What is voluntary attention?
Effort to select goal-relevant information
54
What is reflexive attention?
Attending to particular stimulus because it has seized your attention
55
What is spatial attention?
ability to attend to region in a space - like a spotlight illuminating and raising the profile of whatever falls within its focus
56
What is posner cueing task?
When you are cued when the target is coming from -> you are faster and more accurate when cued
57
What is endogenous (or central) cue?
engages voluntary attention and can appear in btw. the potential target locations and indicate symbolically where the target is likely to appear
58
What is exogenous (or peripheral) cue?
Engages reflexive attention and can appear at one of the target location instead in between them
59
Can both endogenous and exogenous cues be valid or invalid?
Yes, both can either correctly or incorrectly indicate target location -> valid cue lead to faster response vs invalid is slower
60
What is the phenomenon, inhibition of return?
when attention is briefly inhibited from returning from that spot - helps you avoid checking the same place over and over again
61
What is feature based attention?
the ability to attend to or filter out information based on features like color, shape or motion
62
How does feature based attention work?
Feature based attention appear to increase activity in neural regions sensitive to the target feature across visual field -> neurons sensitive to feature heighten while neurons that are not sensitive suppress sensitivity
63
What is temporal attention?
our ability to pay attention to points in time
64
What is attentional blink?
An effect in which the second of two targets in rapid succession of items is more difficult to detect than the first
65
What is object based attention?
selective attention to an object rather than to a point in space
66
What is spatial neglect?
which they fail to process stimuli that fall within their left visual field
67
What is the biased competition model of attention?
stimuli in a cluttered visual environment compete with each other to drive the responses of neurons in the visual system
68
What is bottom up selection vs top-down selection?
Bottom up: salience of physical feature Top down: items that are goal relevant
69
What is late selection?
Processing the meaning everything around us before we select what will gain entry to heightened awareness
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What is early selection?
we attentionally select stimuli on the basis of physical features such as color, pitch or location and we register meaning only after we have selected them
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What is preattentive processing?
we process information before attentionally selecting it
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What is parallel processing?
we take in stimuli quickly and all at once - this is assuming preattentive processing
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What is serial processing?
items get attentionally selected - more slowly one bit of at a time
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What is a visual search task?
participants look for a target embedded in an array of nontargets
75
What is feature integration theory?
During preattentive processing, we exprience the world as a jumble of simple features that are not bound together into cohesive objects - we see splashes of color and general shape
76
What is dichotic listening?
which participants listen to two different messages played simultaneously over headphones - led to Broadbent filter model of attention, where you hear both and then you filter out what you don't need - an early selection
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What is broadbent's filter model of attention?
Input (attended + unattended) -> selective filter; filter out unattended message -> higher level processing (detector) -> working memory
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What is treisman's attention model?
Input (attended + unattended) -> attenuator; filters physical properties -> dictionary unit, unattended msg still passed but weakly -> both go into working memory - meaningful information needs to meet a lower threshold of processing in order to reach awareness.
79
What is the load theory of attention?
The extent to which you process task irrelevant stimuli (attentional capture) depends on the perceptual load
80
What is perceptual load?
If the attended task is very demanding (“high load”), then attentional resources will largely be occupied, with few spare attentional resources for processing of unattended information. In this case, “unattended” information will be filtered out at an early stage of processing and will neither reach awareness nor interfere with the attended task.
81
What situation is best for people's ability to filter out irrelvant stimuli?
Best under perceptual load and worst under working memory load
82
What is working memory load?
load is high because a task taxes working memory, this is known as working memory load and processing of nontarget information appears to increase
83
What is modulation?
attention can change the way we perceive a stimulus
84
What is vigilance?
can enable us to better respond to stimuli before they appear
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What is the distractor is the same as the target in perceptual load task?
Congruent/compatible
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What is the distractor is different as the target in perceptual load task?
Incongruent/incompatible
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What are the results between low load (congruent incongruent) and high load (congruent, incongruent) ?
In general for response time, High load > Low Load + Incongruent > congruent in both loads Difference btw incongruent and congruent in low load is much larger than the difference in high load -> the difference for high load is so small, there is almost no distraction Response time ranking from Highest: High load, incongruent > High load, congruent > Low load, incongruent > Low load, congruent
88
What is the Gabor patches?
one each trial -> participant were asked to determine which Gabor patch had highest contrast btw. dark and light stripes and whether patch titled to right or left -> when cue flashed in middle of two patches aka no bias -> participants showed no bias in reporting the tilt of one over the other BUT when cue flashed at one of the patches -> that patch perceived as higher contrast and bias to report tilt of patch at flashed location Spatial attention modulated how people perceived the visual qualities of a stimulus
89
What is inattentional blindness?
a phenomenon in which people fail to notice an unexpected item right in front of their eyes when their attention is preoccupied - inattentional blindness is influenced by our expectations: if you expected a gorilla, you probably saw the gorilla, but you might still have missed the player who left the game or the changing color of the curtain
90
What is change blindness?
the failure to notice large changes from one view to the next, and it reflects another, related failure of awareness in the absence of attention
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What is the difference between change blindness and inattentional blindness?
inattentional blindness refers to a failure to notice a stimulus at all, evidence suggests that change blindness can sometimes occur not because people fail to notice a stimulus, but because people fail to compare two views of a stimulus in memory.
92
What is rapid serial visual presentation task?
the one where people have difficulty reporting the second target if it appears too soon after the first target -> attention may need a "resetting period"
93
What is explicit vs implicit attention?
Explicit: conscious awareness Implicit: rely on nonconscious measures such as response time or eye movements
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What is attentional capture?
focuses on understanding the kinds of stimuli that can draw our attention reflexively
95
What is attentional bias?
our tendency to direct attention to some types of stimuli over others
96
What is emotion-induced blindness?
They could not find the landscape when the target appeared within about a half-second after a task-irrelevant emotional picture, even though they were looking right at it
97
What the broaden and build theory?
Positive emotions broaden scope of attention (attentional widening), perception, cognition and actions In contrast, this account suggests that negative emotions such as anxiety narrow the range of information people are inclined to consider, which might serve an adaptive function by making it easier for people to take efficient action.
98
What is cognitive control and types of it?
The ability to orchestrate thought and action in accordance with internal goals Proactive control: In anticipation of a challenge Reactive control: In response to a challenge
99
What is cognitive overlap?
How much the demands of simultaneous tasks compete for the same mental resources
100
What is cognitive interference?
when load is high or when two tasks overlap, and performance suffers as a result ie distracted driving
101
Does studying to music help?
- Music can enhance your mood and alertness - But: if processing music has too much overlap with what you are studying, it will interfere! - Lyrics vs no lyric
102
When do we need cognitive control?
- Not for automatic processes - For controlled processes ->There are hardly any tasks where you really do not need cognitive control Even for the most automatic processes, you still need a bit of control to get started, to inhibit other tasks, to switch to another task, etc. -> More or less depending on the cognitive load of a task (differences in how much resources are used)
103
What is perseveration errors?
persistent responses that fail to adapt to chaning rules or circumstances - typical of people with prefrontal damage - normal people can pass the delayed-alternation task, pick A -> B->A, will pick up the rule but people with prefrontal damg. will just pick same option
104
What is inhibition?
the ability to suppress information, thoughts, or actions that may interfere with ongoing behavior—to tap a brake on mental operations
105
What is the stop-signal task?
Classic measure of inhibition, respond quickly to green for go or red to stop - in early stop trial: stop signal appeared early - can inhibit - in late stop trial: stop signal appeared later - people find it more difficult people with good inhibition can respond to late stop better than people with poor inhibition
106
What is sustained attention/vigilance?
ability to maintain focus on a task
107
What are some class cognitive interference tasks?
Dual-task experiment: test whether there is cog. interference - total load being high or from too much overlap *response interference Flanker & Stroop task: interference from automatic response of reading *perceptual interference Flanker task: interference from example spatial proximity *spatial interference simon task: interference from spatial incompatibility
108
What is the anterior cingulate cortex?
Active when there is interference -> gives off an error response when something goes wrong ("oh shit potential" or error-related negativity) - important for error detection - activate when a prediction error occurs, when you do not receive the reward or outcome you predicted
109
What does the error-related negativity predictive of?
Substance abuse to severity of OCD - Lower ERN for cocaine addiction = relapse to cocaine addiction - people with OCD has higher ERN
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What is psychological refractory period?
Fundamental bottleneck in information processing -> when R2 is slower than R1
111
What are 2 explanations for the psychological refractory period?
Central bottleneck model: only one response can be selected at a time, so 2nd response is queued Strategic resource sharing: responses to both stimuli can be selected at the same time, but priority is strategically given to the first response, slowing the 2nd response
112
What is the task-switch cost?
refers to the speed and accuracy penalty that comes with having to switch tasks - task switch = lower accuracy + speed
113
Can we reduce task switch cost? can it completely go away?
Preparation effect: increase time btw target give people mroe time to prepare = less task switch cost cannot completely eliminate - its called residual switch cost - will always have - swtich task need cognitive control -> prefrontal cortex more active for task switch trials than no switch
114
What is working memory?
a brain system that provides temporary storage and manipulation of the information necessary for such complex cognitive task as language comprehension, learning and reasoning (by Alan Baddeley)
115
What is storage?
Maintains information after it is no longer available in perception - no longer visible, audible or touchable - form of internal attention
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What is Baddeley's model for working memory/structure of working memory?
Central executive: primary system for controlling attention and thinking - where info is manipulated Phonological loop: stores and rehearses verbal and acoustic info Visuospatial sketchpad: stores and manipulates visual information Episodic buffer: multimodal, it integrates information from multiple internal sources - from phonological loop, visuospatial sketchpad, and long tern memory - into episodic representation
117
What is the central executive in working memory?
Command centre of working memory - perform all cognitive control ie inhibition, response selection, task switching, decision making and planning ect -directing attention (internal and external) - prefrontal cortex
118
What is the phonological loop?
2 mechanisms: (1) a phonological store that holds sound- or speech-based information for 1 to 2 seconds, (digit span task) and (2) an articulatory rehearsal loop, which occurs through inner speech (uttering things to yourself without vocalizing out loud) - (capacity of 7 plus or minus 2)
119
What is the capacity of phonological working memory?
Word length effect: working memory capacity for wards or other phonological stimuli depends on the spoken duration or syllable length of the words -around 2 seconds of length - one syllable remb better than 5 syllable Word similarity effect - words codded acoustically - rhyming helps
120
What can interfere with the phonological loop?
Irrelevant speech effect: Impairment of working memory by irrelevant spoken material - e.g. nonsense words or foreign language -> interference occurs due to the phonological syllabus themselves not the meaning of it Articulatory suppression: disruption of working memory that occurs when uttering irrelevant sounds. -> only verbal not visual information -> affects phonological store
121
What is visuospatial sketchpad/visual short-term memory?
Retain visual information over time, especially when the perceptual image is no longer available, or has changed, most commonly whenever you move your eyes.
122
What is the capacity of the visuospatial sketchpad/visual short term memory?
Visual short term memory task - can remember 4 features of either line orientation or colours How about multiple features? - if visual memory based on features, it should breakdown at more than 2, if its object based than should be 4 objects so yes, they could -> visual memory is object based
123
What is the slot model response to visual short term memory?
slot = object, visual short term memory can store all of the obj's features w/o reducing the capacity of other objects, up to 4 objs - 4 chairs and any 4 people can sit on it
124
What is the resource model for visual short term memory?
Resource model of visual short-term memory: capacity is a limited resources shared by all objects -> so capacity depends on complexity of obj. e.g. 4 chairs can fit 8 children or 4 adults only
125
Can an object be infinitely complex for visual short term memory? Is slow model or resource model correct?
Answer both correct. Visual memory constrained by Superior intraparietal sulcus - can hold 4 items then drop, but when complex objs have to be maintained in WM -. performance fail after 2 items, same for superior intraprietal sulcus => sensitive to features or resources like bench seating Inferior intraparital sulcus - show different pattern, increases activity up to 4 objs, regardless of complexity or model = sensitive to objs or slots, like individual chairs
126
What is an episodic buffer?
a storage space for the executive controller to combine information from the phonological loop and visuospatial sketchpad - constructs new representations on the fly - Solves the binding problem
127
How does cognitive control and emotions affect each other?
Cognitive control can help with unwanted emotions * Inhibition of unwanted thoughts (like rumination) requires cognitive control Unwanted emotions can hamper cognitive control * Stress and anxiety take up WM capacity! * Rumination does not help performance * Scarcity hypothesis: devote excess attention and resources -> increases cognitive load -> decline in executive functioning
128
What is ego depletion?
occurs when one’s energy for mental activity is exhausted, impairing cognitive control and other cognitive activities - low glucose levels so dont make decision on empty stomach!
129
What is attention restoration theory?
being out in nature can restore cognitive fatigue
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What is memory?
family of processes involved in encoding, storing and retrieving information about our experience of the world
131
What is short term memory?
information that is stored for a short duration, which fades after several seconds if not actively attended to or transferred to STM
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What is long-term memory?
long term storage of information, which can stretch back decades
133
What is the memory paradox?
Memory is falliable - eyewitness misidentifying yet immense, people can memories the whole Iliad by heart
134
What is method of loci?
Assigning pieces of information in a room - as a cue
135
What is sensory memory?
highly detailed but short-lived impression of sensory information - Iconic and echoic memory
136
What is the r/s btw sensory memory, STM and LTM? (Atkinson and Shiffrin)
Stimulus -> evoke sensory memory -> if you give attention to sensory memory -> becomes STM -> encoding STM leads to LTM while retrieving LTM becomes STM
137
What encoding strategies are there?
* Rehearsal (not very effective) * Chunking * Elaboration - Depth of encoding - meaning and function of features (shallow, intermediate, deep) - Self reference - thinking of how it is relevant to you - Self imagining - imagine something in personal perspective * Hierarchical organization - meaningful network of associations * Spacing (distributed vs massed practice) - your remb better if you test over time rather than a single session
138
What is retrieval?
Act of accessing memories (not like a computer file) - Distorted! Previous information and experience and expectations influences our stored memory,as well as encoding problems
139
How does testing effect and generation effect affect retrieval?
Testing effect: practice in retrieving information leads to better retention of material than does repeated studying generation effect: memory is enhanced for a list of items a person has generated versus one that a person was simply asked to memorize (writing in your own words_
140
What are rational and irrational behavior?
Rational: objective and logical Irrational: subjective and biased
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What is psychological bias?
psychological factors affect our decision making in consistent ways
142
What are system 1 and system 2 thinking?
System 1: decision making that operates quickly System 2: decision making that operates more slowly and more deliberate control
143
What are heuristics?
Mental shortcuts we take as part in system 1
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What are base rate frequencies/prior probabilities?
how often an event or situation actually occurs
145
What is representative heuristics?
mental shortcut used to estimate the likelihood of an event based on how closely it matches or represents related examples or stereotypes - we suck at stats lmao
146
What is conjunction fallacy?
the false assumption that a combination of conditions is more likely either condition by itself
147
What is law of sample size?
Smaller sample size produce more variance - larger size = more valid
148
What is gambler's fallacy?
the faulty reasoning that past events in a sequence affect the likelihood of future events - events are typically independent from each other
149
What is the hot hand effect?
related to gambler's fallacy; perception on being "on a roll" - seeking patterns when none exist/inferring causes to explain random events
150
What is availability heuristic/bias?
people estimate the frequency of an event on how easily examples come to mind
151
What is anchoring?
How different starting points (initial values) produce different estimates or decisions
152
What is the decoy effect?
the introduction of a more- or less-expensive item provides an anchor to stimulate the sales of the target item e.g. small, medium and large coffee
153
What is deliberation-without-attention effect?
You have consciously made decision, but unconscious process helped your reach it
154
What is less-is-more effect?
situations where too much information, computation or time devoted to a problem may lead to less accurate, sensible, or satisfying decision
155
What is recognition heuristic?
People are presented with two alternatives place higher value on the one they recognize vs the one that is strange or novel
156
What is the fluency heuristic?
people assign higher value to the option that is recognized first, that is, more quickly and easily - increased fluency, increases the perceived truth or repeated claims or fame of name - stocks that can be pronounced more fluently tend to perform better
157
What is the one-clear-cue heuristic?
base one’s decisions on a single cue
158
What is the fast and frugal search trees?
involve a limited set of yes–no questions rather than a larger set of probabilistic one - used in emergency medicine
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What is tallying?
a heuristic that simply involves counting the number of cues that favor one alternative over another - does not involve weighing of cues according to their importance
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What is utility and risk?
Utility: satisfaction that we obtain from choosing an option positive utility: gains negative utility: losses or costs risk: probability of negative outcome
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What is rational choice theory? How do we calculate expected value?
We make decisions by comparing the expected value of our options Expected value = value x probability
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What are the difference btw. normative theories and descriptive theories?
Normative theories on rational, logical and mathematical calculations to compare decision options - how decisions should be made in order to max utility and rewards Descriptive theories: how we actually decide, describing beliefs and preferences as they are
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What is subjective value?
the notion that utility is not objective but dependent on the decision maker and context.
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What is loss aversion?
people hate losses more than they enjoy equivalent gains, and they tend to prefer a sure gain over risky gains
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What is the framing effect?
bias where people react differently to a particular decision depending on how it's presented
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What is the status quo bias?
Preference for a current state of affairs -People like to avoid transaction cost - choosing a new option requires weighing its gain relative to giving up status quo (loss) -> people are loss averse
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What are optimal defaults?
Automatically place people into options that have the greatest benefit
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What is the endowment effect?
tendency to overvalue what one has in hand = overvalue your possessions
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What is the sunk cost effect?
greater tendency to continue an endeavor once an investment in money, effort, or time has been made
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What happens when someone has damage to their prefrontal cortex?
More impulsive - make riskier decision
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What is the theory of embodied cognition or grounded cognition?
shared representations are used for perception, action, and knowledge ie seeing a pen, using a pen and thinking about a pen are supported by shared representations
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What are concepts?
The mental representations in the brain that correspond to objects or ideas in the world
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Why is categorization useful?
1. Facilitates communication, to convey ideas to others in an effective manner 2. Permit inference - allow you to generalize from prior experience to understand new objects or event 3. Make better decisions and predictions
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What is feature-based categorization?
A set of characteristic features - based on similarity or resemblance
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What is family resemblance?
Items in a category tend to share features
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What is prototype categorization?
Prototypes: typical or ideal member of that category - typicality effect: how some members of a category are more representative than others - propose that we store an average instance in our mind sentence verification task: people are quicker to affirm examples that are close to a prototype than they are to affirm atypical example
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What is exemplar-based categorization?
Related to the prototype idea in that it is a family resemblance theory that depends on similarity among items within a category - store all specific examples shown in our mind, when showed new instance, our mind matches it against all stored exemplars
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What are the hierarchical structure of categories?
Superordinate: Categories that can have other categories within them (e.g. mammal Basic: named task (e.g. dog) Subordinate: highly specific (e.g. german shepard)
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How do we store knowledge?
One belief: Hierarchical networks/Semantic network vs Constructionist model/distributed networks
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What are hierarchical networks/semantic network and how does it work?
Hierarchical networks that contain nodes (pieces of information) and links (associations) - like a branching tree activation or processing at a node travel across links -> spreading activation the longer the connection/more nodes to be traversed -> more time to answer the question - measured using speed of activation
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What are connectionist model/parallel distributed processing/distributed network? How it works
Models are not stored in single nodes, but are more widely distributed across nodes influencing each other in parallel. Active nodes can spread their activity to other connected nodes with links that have different strengths, also known as connection weights. - connections are either excitatory or inhibitory
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What is sensory functional account?
Concepts are grounded in actions and perception. - meaning of word and objs are stored in sensory and motor system Cortical activations for the naming of people, tools, and animals, similar to those areas damaged in patients. Naming pictures of animals activates regions important for processing perceptual features, while naming tools activates brain regions involved in action
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What is intelligence?
ability to reason, solve problems, and gain new knowledge.
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What is the standord binet test?
first iq test - gave us the term intelligence quotient - (mental age/ chronological age) * 100
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What is spearman's two-factor theory of intelligence?
general intelligence (g) and specific intelligence (s)
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What is Raymon Cattell's crystalized intelligence and fluid intelligence?
Divided g into crystallized intelligence (Gc) and fluid intelligence (Gf). Crystallized: people knowledge fluid: adaptability
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How do we measure fluid intelligence?
Raven's progressive matrices: those patterns problems and you pick the correction option out of 8
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What is r/s btw. working memory and intelligence?
Working memory correlated with fluid intelligence, reasoning ability, comprehension and IQ
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What is nativism view on the development of knowledge and intelligence?
Core knowledge theory: people are born equipped to learn specific types of information such as language, physics, numbers, and psychology
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What is the empiricist view of the development knowledge and intelligence?
Infants are blank canvas -> knowledge acquired by forming associations through experience
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What is heritability?
refers to the extent that genetics can explain variation (differences) among people Heritability coeff: variance due to genes/total variance -more that variations in intelligence can be attributed to genes, the closer the IQs of close relatives should be
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Piaget's theory of cognitive development?
Sensorimotor period: birth to 2 years Preoperational period: 2 to 7 years Concrete operational period: 7 to 12 years Formal operational period: 12 years and beyond
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What is language?
Structured, creative human communication system that uses spoken, written or gestured symbols to convey referential meaning
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What are the qualities that make up a language of any sort?
1. Language is communicative 2. Language is referential (refers to things and ideas) and meaningful 3. Language is structured (grammar) 4. Language is creative/generative (infinite amount of sentences can be form) and recursion (never ends)
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What is the difference from semantics and syntax?
Syntax is grammar and semantics is meaning e.g. "colorless green ideas sleep furiously"
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What is the mental lexicon?
Library of works we use and their links to real-world representations are known collectively
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How do we access the mental lexicon?
the process of matching word form (phonologically (via sound) or orthographically (via their written form) ) to an entry in the lexicon
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What is pure alexia?
(a type of acquired dyslexia) - brain damage in previously literate adult leads to difficulties in orthographic processing but not phonological processing -> evidence results specifically from damage to left occipito-temporal cortex - but still there is debate if its resp. soley
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What is the spreading activation model?
word meaning link to each other as if organized like web within the mental lexicon - exposure to one word ("prime" word) activates the corresponding node in this web, and activation spreads along the web, activating other words to different degrees depending on the strength of their connections to the prime word
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What is the lexical decision task and findings?
Make rapid judgements about strings of letter that are presented to them Finding: word frequency effect: that people are faster to respond to high freq. words (they have encountered a lot) than to low freq. words
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What is semantic priming?
exposure to a word influences a response a response to a subsequent stimulus
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What is affective priming?
Words can be primed not only by preceding items that are semantically related, but also by preceding items that have the same emotinal quality e.g. aging and mental health
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How do we add words to our lexicon?
Fast mapping: one shot learning Mutual exclusivity assumption: new object = new word Whole object constraint: object refers to whole thing, not just parts Shape bias: look the same. prob the same
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What is the hierarchical system/structure of language?
Smallest to largest: Phonemes, syllabus, morphemes, words, phrases and sentences
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What is phonology?
How are phonemes allowed to form a morpheme together? (smallest unit of sound)
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What is morphology?
How are content and function morphemes allowed to form words together? (forming of words/smallest meaningful unit of language)
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What is syntax?
How morphemes together form a sentence (rules governing sentence structure)
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Can language learning be explained by behaviorism?
No! - children learning language (poverty of stimulus) - children don't get consistent +ve nor -ve feedback as behavourism is reliant on reinforcement - also children often uses overgeneralisation ie "Hitted" -> no one is saying that, so where did they learn it from?
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What is universal grammar? (Chomsky)
Every human language has rules for transforming mental representations into structured expressions - Transformational grammar Every human is born with the innate predisposition to learn language - Language acquisition device - Modular, does not depend on other cognitive abilities - Critical period (to learn)
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What is transformational grammar?
E.g. "The dog bit the man", "The man was bitten by the dog" Both sentence hv deep structure: same meaning but different surface structure (way the representation is structured linguistically)
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What is the critical period for learning language?
Genie: 13 year old girl that lived in total isolation with no interaction but couldn't master the language Ofc you can learn and become fluent it just take time
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What is pidgin and creole language
When people start combing language - pidgin like i speak chinese and english and then the next generation have a creole language - like they have a whole structure, rules for that language ie Singlish
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What is some alternative to Chomsky universal grammar model?
Markov models - transitional probabilities between states - we are really good at statistical learning - finite state grammar - Large language model: do they behave like humans? - Chomsky opinion: statistical language plagiarism Usage-based linguists - language as a network of information - learned and shaped by general cognitive processes and social behavior like using working memory, social information for the function of communication
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What is the function of the Broca's area?
Left hemisphere, in the inferior frontal gyrus - speech production and syntax - but with new evidence: damage to broca lead to both impairment in production and comprehension but only when syntax is crucial
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What is Broca's aphasia?
difficulty speaking fluently, producing correct sounds, or finding the right words but can comprehend speech
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What is the function of wernicke's area?
- left hemisphere, near the juncture of the temporal and parietal lobes - Language comprehension and semantics
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What is Wernicke's aphasia?
condition is characterized by difficulty understanding the meaning of words and sentences
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What are the other types of aphasia?
Anomic aphasia: people have difficulty finding the words they want to say Global aphasia: people have great difficulty both producing and comprehending spoken language
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What are speech errors?
Anticipation error - Spoonerism - We activate multiple phonological representations - We active phonology in parallel with syntax and semantics Tip-of-the-tongue phenomenon - Shows access to all sorts of partial information about words - Phonological, gender, word length
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What are the several components that make uplanguage comprehension?
Speech segmentation: boundaries btw words Parse: ability to determine the boundaries between word - can understand people when talking super fast Phonemic restoration effect: will often "hear" spoken phonemes that have actually been rendered inaudible due to background noise - McGurk effect - where visual messes up audio
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What is garden path sentences?
sentences that begin by suggesting one interpretation only to present another interpretation with their later parts “The fireman told the man that he had risked his life for to install a smoke detector
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What is the curse of knowledge?
The difficulty that experts often have in putting themselves into the shoes of less knowledgeable listener
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What is referential communication task?
When you have two participants are seperated by a partition and one other pariticpant describes objects what they are seeing Finding: New yorker describe what they see depending if other participant is new yorker or not
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What is the Sapir-Whorf Hypothesis ("Linguistic determinism")?
differences among language reflect and contribute to differences in underlying thought processes Strong form: Language shapes perception itself - eg Pirahã don’t have words for numbers, they can perform relatively complex numerical calculations. That said, the Pirahã have been found to have difficulty remembering such calculations, suggesting that language can affect the way we attend to information and encode it into memory Weak form: Language shape scategorization, attention, but not perception itself
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What is delay discounting/temporal discounting?
The psychological tendency that people diminish the value of future gains the longer they have to wait for them
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What is deductive reasoning?
moving from general knowledge and principle to more specific knowledge and example
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Consider the statement "If P is true, therefore Q is true". Which is the antecedent and which is the consequent?
Antecedent: P Consequent: Q
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Consider the statement: "If P is true, then q is true". What is modus ponens?
A valid form of reasoning in logic that states when statement is accepted and the antecedent (p) holds true, the consequent (q) can be treated as true
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Consider the statement: "If P is true, then q is true". What is modus tollens?
A valid form of reasoning in logic that which the consequent (q) of a conditional proposition is denied, thus implying the denial of the antecedent (p).
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What is the denial of the antecedent/inverse fallacy?
An invalid form of logic that assumes the inverse of the original statement that the negation of the antecedent (p) implies the negation of the consequent (q). You are a teacher, therefore you have a job. Denial of the antecedent: You are not a teacher, therefore you have no job -> obv. wrong, you might be working something else
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What is affirming the consequent/fallacy of converse?
An invalid form of logic that states that because the consequent (q) is true, therefore the antecedent (p) is true. E.g. broken lamp cause the room to be dark affirming of consequent: Room is dark because of broken lamp -> not true, there could be no light source at the first place
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What is inductive reasoning?
Using past observations and experiences to make predictions about novel cases
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What is property induction?
When people generalize properties or features from one exemplar of a category to another
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What is premise-conclusion similarity?
the more similar the premise and conclusion categories, the stronger the inductive argument will be
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What is premise typicality?
If the premises are more typical or representative of a category, they will lead to stronger inductions
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What is premise diversity?
Properties shared by diverse or dissimilar categories linked by a superordinate category (e.g., the mammal category is superordinate to its subordinate categories lions and goats) are more likely to be generalized than properties shared by similar categories (e.g., lions and leopards)
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What is premise monotonicity?
The larger the number of premises that share a property, the stronger the induction
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What is causal reasoning?
The ability to understand why something happens, to determine the causes of specific effects
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What is causal launching?
Causation associated with direction
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What is illusory correlations?
when people make connections between variables that have no relation to each other
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What is counterfactual reasoning?
involves the human tendency to create possible alternatives to life events that have already occurred; something that is contrary to what actually happened. "If only"
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What is Bayesian inference?
Allows us to estimate the probability of a hypothesis being true based on the evidence at hand and your knowledge of the world
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What is Bayes' rule?
P(H|E) = [P(E|H) x P(H)]/P(E) P(H|E) = posterior probability = probability of hypothesis being true given the evidence P(H) = prior probability = probability of hypothesis being true before any evidence obtained P(E|H) = likelihood = probability that evidence would be observed when the hypothesis is true
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What is is a problem?
When present state does not match the goal state, and it is not immediately obvious how to get from the present state to the goal state
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What is insight?
the process of suddenly gaining a solution to a problem
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What is transfer solutions?
learning how to solve one problem generalizes to solving others - e.g. writing and reasoning helps in other classes that require writing
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What is analogical reasoning?
people find solutions by transferring their knowledge from other problems -> recognize analogies (similarities) between new problem and older problem that they know how to solve e.g. mutilated chess problem to Russian marriage problem
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What are heuristics?
Shortcuts or simple strategies to solve problems
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What is random trial and error?
involves randomly selecting and applying different potential solutions until the problem is solved
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What are intermediate states/hill climbing?
includes selecting options that move the problem solver a little closer to the end state.
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What is means-ends analysis?
requires being specific about creating goals and, importantly, subgoals to find moves that solve the problem - Reduce the difference between the current state and the goal state
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What is situated cognition?
the idea that thinking is shaped by its physical and social context
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What is state space complexity?
is the log10 (order of magnitude) of the number of possible states the state space is larger, it will take more effort to find a solution.
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What is convergent creativity?
is measured with e.g. the remote associates test (RAT) What words relates to these three concepts ? - flake - mobile - cone
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What is divergent creativity?
measured with e.g. the alternative uses test (AUT). another is called Torrance Test of Creative Thinking - same concept but you write about product improvements or construct pictures How many uses can you think of for this object? - - A brick - A plank of wood -And scored on fluency, originality, flexibility, and elaboration
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What are flat associative hierarchies?
For particularly creative individuals the less obvious associations are nearly as accessible as the obvious ones (For the RAT)
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What is functional fixedness?
the tendency for our thinking to be boxed in by predefined uses and associations
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What is theory of mind?
The ability to consider what the other party is thinking
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How does oxytocin affect level of trust in a person?
- a neuropeptide that is important for pair bonding, maternal care, and sexual behavior -Oxytocin also increased generosity in the ultimatum game
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What is Nash equilibrium?
describes a strategy for all players, in which no player has anything to gain by changing their strategy e.g. prisoner's dilemma -> Most rational move is to always defect.