Short Answer Questions Flashcards
(30 cards)
Long- Term Potentiation
laboratory finding in which brain slices from the hippocampus are activated with high-frequency stimulation in the dendrite leading to the firing of connected neurons
What are the features of Long-Term Potentiation
LTP is associative: one weak input, which wouldn’t normally produce LTP, when combines with strong input, which would produce LTP, will yield LTP for the weak input
Broadbent’s Sensory Filter
physical characteristics (e.g., pitch, loudness) of an auditory message were used to focus attention to only a single message.
What are the features of Broadbent’s Sensory Filter
early selection model because irrelevant messages are filtered out before the stimulus information is processed for meaning.
Reminesence Bump
The spike in autobiographical memory recall occuring between the ages of 18-30; additionally they have no recall during the period of infantile amnesia and have a similar spike in recall in the most recent years of thier life due to the Recency Effect
Experimental evidence for the Reminesence Bump?
Crovitz technique: P’s asked to remember the first autobiographical memory that comes to their mind when they are prompted with a word
Explanations for the Reminensence Bump?
(1) cognitive (novelty; it also explains why immigrants get a second reminiscence bump); (2) identity formation coincides with that time (Erickson); (3) genetic fitness (that period corresponds to the time when people are in their best biological shape), and (4) life scripts (most frequently cited life events are in early 20’s and late teens)
Amygdala’s involvement in memory?
emotional learning, more percisely fear conditioning
Experimental evidence for amygdala’s involvement in memory
Fear conditioning: 3 successive sequences: (1) Unconditioned Stimulus (e.g. shocks) produces an Unconditioned Response (e.g. Fear); (2) Unconditioned Stimulus (shocks) is then paired with a Conditioned Stimulus (e.g. a neutral tone) and produces the Unconditioned Response (e.g. Fear); (3) Conditioned stimulus (neutral tone) produces the Conditioned Response (e.g. Fear)
Mechanism of fear conditioning doesn’t work if the Amygdala is damaged
Fear conditioning and Galvanic Skin Response
GSR in conditioned responses is correlated with amygdala activity
Case study reguarding amydala involvement in memory
SP: bilateral amygdala damage: unable to experience fear response
Amygdala and retrieval
Patients with MTL damage limited to amygdala damage recalled fewer negative memories and rated their memories as less intense, novel and vivid.
fMRI studies on amygdala and retrieval
P’s given autobiographical memory task in which they were asked to recall autobiographical events by self generated memory cues; during task amygdala and hippocampus were activated
Retrieval Induced Forgetting
(1) P’s study a series of paired associates, comprising different category-target pairs. (2) P’s get selective retrieval practice on half of the targets from half of the categories. (3) P’s have a final recall task on all the paired associates.
Results: Retrieval of certain items induces inhibition for related, unpracticed items from the same category of knowledge
Social Contagion
new or misleading memories can be implanted into the already established memories of the group
Implicit Theory of Stability
we have implicit theories about ways in which we expect to have remained the same over time, and ways in which we expect to have changed over time.
Experimental evidence for the Implicit Theory of Stability
Dating Experiment: P’s asked what they thought of present partner; in 6mo follow-up P’s asked what they thought of same partner: (broken-up) reported not liking partner, but did like partner at initial time; (together) reported liking partner at both times.
Conclusion: People expect their opinion of their partner to have remained stable over time, so they remember their past opinion as being consistent with their current opinion.
Attentional Resource Pool
multiple resource pools for each sense (visual, auditory, etc.)
Experimental evidence for the multiple Attentional Resources Pools
P’s improvement on 2 tasks (reading and writing; reading/processing at meaning level and writing) improved with practice.
With training, participants are able to divide their attention very effectively so that they can do two things simultaneously.
Illusory Conjunction
P’s presented with three letters in different colors really fast (e.g. blue G; red B; green S): (condition 1), P’s asked to focus their attention in the middle of the screen; (condition 2) P’s instructed to shift their attention across the screen; then P’s asked to report which letter was which color.
Results: P’s made more illusory conjunctions (saying blue B, green G) in condition 2 than in condition 1. Focusing attention on a specific point on the screen helped participants from condition 1 to integrate stimulus characteristics.
What are the conclusion of the Illusory Conjection experiment
provides evidence for Treisman’s Feature Integration Theory, which proposes that objects are processed pre-attentively at a feature level first and can only be combined into objects by focusing attention. Illusory conjunctions therefore occur because attention can’t be focused during the rapid visual presentation of objects, and so their features become confused
Schacter-Singer Theory of Emotion
emotions involve both arousal and appraisal and are experienced at the cortical level because people interpret their physiological states
Experimental evidence for Schacter-Singer Theory of Emotion
P’s in experimental condition: injected with Adrenaline ((1) informed: told the effects of adrenaline; (2) misinformed: told the injections caused headache and numbness; or (3) ignorant: told nothing) or P’s in control group: injected with Placebo; P’s asked to fill out questionnaires with a confederate (behaving either euphoric or angry).
Results: P’s misinformed and ignorant: behaved like the confederate because they couldn’t interpret their own physiological state; P’s informed: not influenced by confederate because their physiological states match the information provided and could correctly interpret their physiological effects according to their expectations
Verbal Access Memory
This system processes conscious & voluntarily retained information that can be later on accessed through verbal cues. Corresponds to ordinary autobiographical memories that we can encode and access by using verbal cues. When you encode normal events you encode them around a narrative to make sense of it