final exam Flashcards
(35 cards)
memory, different abilities, three systems
MEMORY: retention of information over time
memory reflects different abilities (its not just one thing)
** memory is RECONSTRUCTED not REPRODUCED **
- you dont reproduce memories exactly how they happen, you rebuild them
- memory is very fluid
- Memories change everytime you remember them and you rebuild them
- Photographic memory doesn’t exist?
3 general systems:
- 1) Sensory memory
- 2) Short-term memory
- 3) Long-term memory
memory system overview
Each system differs in SPAN/capacity and DURATION
sensory memory (span, duration)
SENSORY MEMORY: holds sensory information (very briefly) so it can be transferred to short-term memory
- Short duration, but large capacity
- Each sense has its own system
- Iconic (vision, ½ a second long)
- Echoic (hearing, 2-4 seconds)
- Allows more elaborate perceptual processing
short-term memory (span, duration, decay, interference)
SHORT-TERM MEMORY: holds information temporarily in your mind
- Aka working memory
- Duration of information lasts about 20-30 seconds (without rehearsing) (because you’re constantly refreshing what you’re thinking about from moment to moment)
- Capacity is limited to 5-9 items
- DECAY: short term memories fade away after a while when untouched
INTERFERENCE: short term memories disappear because our memories get in the way of each other.
long-term memory (explicit + implicit)
LONG-TERM MEMORY: information acquired across lifespan
- Perhaps unlimited (?) duration and capacity
- Different types
1) EXPLICIT/DECLARATIVE LONG-TERM MEMORY: memory that is consciously recalled
- EPISODIC: events in our lives we’ve consciously experienced (events you’ve consciously lived through first-hand) (e.g. remembering what you wore yesterday)
- SEMANTIC: facts of the world (knowledge and concepts) (e.g. 9/11)
- These two divisions exist in different parts of the brain because you can have one and not the other
- Episodic memories can turn into semantic memories
2) IMPLICIT/NON-DECLARATIVE LONG-TERM MEMORY: memory that does not require conscious thought
- PROCEDURAL: habits and how to do things (skills and actions) (e.g. playing piano without thinking about it) (e.g. tying your shoes)
- PRIMING: exposure to a stimulus influences future response to a different stimulus (information you’re exposed to earlier influences what information you recall later on) (e.g. imagining the colour yellow so you think of banana)
primacy and recency
Tendency to remember different words based on where they are on the list (beginning or end) because of short and long term memory
PRIMACY: remembering things at the start of a list well (long-term affects?)
RECENCY: remembering things at the end of a list well (short-term effects?)
3 memory processes
- ENCODING
- STORAGE
- RETRIEVAL
memory process 1: encoding (attention + mnemonics)
- ENCODING: process of getting information into our memory
ATTENTION
- Unless you pay attention, it won’t be encoded (it won’t encode to long-term memory) (e.g. what direction does the sail face on a dime?)
MNEMONICS
- Learning aids/strategies that enhance later recall (e.g. BEDMAS)
memory process 2: storage (engrams + consolidation + schemas purpose in future situations)
- STORAGE: maintaining information over time in memory
ENGRAMS
- Physical trace of memory in the brain (the memory itself)
- Physical changes in our brain as a result of experience (memory traces)
- Structural + functional changes in our CNS as a result of experience
CONSOLIDATION
- Stabilizes memory traces in CNS
SCHEMAS: Mental models or knowledge structures (e.g. what a sofia is, how to order at a restaurant)
- Gained through experience (the general idea of an object is encoded in your CNS) (e.g. you know what a car deos even though you dont remember every single car you’ve ever seen)
- Frames of reference for interpreting new situations (knowledge you have for the new observation of an object)
memory process 3: retrieval ( recall + recognition + retrieval cue)
- RETRIEVAL: accessing information when you need it
Whatever circumstance you’re in when encoding, that’s the best circumstance to be in for retrieval
- Reactivation or reconstruction of memories from storage
2 types:
- RECALL: generating remembered information on your own (e.g. generating the correct response on short answer)
- RECOGNITION: selecting previously remembered information from several options (e.g. recognizing the correct multiple choice option)
- RETRIEVAL CUES: hints that make it easier for us to recall informationE
encoding and retrieval (context-dependeant, state-dependent, and mood-dependenet memory)
CONTEXT DEPENDENT MEMORY: match in physical/external context between encoding and retrieval
- e.g. where you learn information is where you’ll retrieve it best
- e.g. divers encode on load, recall best on land, encode underwater, recall best underwater
STATE-DEPENDENT MEMORY: match in internal/mental context between encoding and retrieval
- e.g. learning sober/drunk vs recalling sober/drunk
MOOD-DEPENDENT MEMORY: match in mood between encoding and retrieval
- e.g. if you learn it happy then your best recall is when youre happy
Karl Lashley
ENGRAM: physical changes in our brain as a result of experience (memory traces)
- Tried to find where engrams are stored
- Trained rats to run mazes
- Create lesions in the brain
- No one area when lesioned created memory problems
LEARNED ABOUT MEMORY THAT:
- Engrams are not stored in a single place, but they’re distributed in the brain
Donald Hebb (LTP + LTD + affect on synapse)
- Lashley’s student
- LTP and LTD represent enduring changes in synaptic strength
- Basis of memory relies on how synapses and neurotransmitters work together
- When a pair of neurons are stimulated at the same time, they fire together
- the more you stimulate a pair of neurons so they’re firing together, the more action potentials are happening at the same time, and cause changes in th eysnapse itself such that it installs more neurotransmitters itself and synapses, or uninstall those things with LTD
LONG-TERM POTENTATION (LTP): strengthening of connections between two neurons after they are repeatedly activated
- increases the efficacy of synaptic transmission
- “Neurons that fire together wire together”
- The more a pair of neurons is stimulated the more action potentials that pair fires together, increasing the amount of neurotransmitters released into the synaptic cleft which results in enhanced learning
- Neurons that fire together lead to an increase in vesicles containing neurotransmitter, and more receptors on the post-synaptic dendrite
LONG-TERM DEPRESSION (LTD): weakening of connections between two neurons after they are both activated
- reduces the efficacy of synaptic transmission
hippocampus (where and what it is + its role in memory)
- Memories are stored across the entire brain
- Hippocampus acts as the “memory index” in temporal lobe
- Takes in information before it installs it into the cortex
synaptic theory of memory
SYNAPTIC THEORY OF MEMORY: memories as relative weights (connection strength) between neurons
- the storage of information in the brain is based on changes to the connections between neurons
brain regions and types of memories (hippocampus + cerebellum + prefrontal cortex)
Hippocampus:
- codes EXPLICIT memories
- Forming new memories
- In charge of explicit memory
Cerebellum:
- related to IMPLICIT memories
Prefrontal cortex:
- semantic memory
- working/short-term memory
Entire cortex:
- Forms of EXPLICIT memory
H.M. and Amnesia (anterograde amnesia + retrograde amnesia)
H.M. was a patient diagnosed with anterograde amnesia
- Had his bilateral temporal lobe (two hypocampi) removed due to seizures
- Brenda Milner discovered H.M. and treated him with anterograde amnesia
AMNESIA: loss or disorder of memory
ANTEROGRADE AMNESIA amnesia: inability to form new long-term memories
RETROGRADE AMNESIA: can’t access old memories
H.M. performed the drawing star from mirror task three days in a row and with each day he showed less mistakes
- This proved evidence of learning (his implicit memory- cerebellum, was still intact)
Elizabeth Loftus + Misinformation effect
MISINFORMATION EFFECT: creating fictitious memories by providing misleading information after the event takes place
Stop sign vs yield sign experiment
- Influence of verbs: The severity of the verb made people misrememebr the speeds they saw the car moving
- Changed the verb to describe what happened: contacted smashed or hit (agressive words + fast speed) vs bumped or collide (gentle words + slow speed)
Lost in the mall example
- Its possible to remember information that didn’t happen
- All of her experiments proved that memories can be altered
factors that affect eyewitness testimony (confidence, race, fixation on weapons)
- Mistaken eyewitness testimonies
- Testimonies are less accurate when the accused is a different race
- Testimonies are better at the time of alleged crime, and worse as time goes on
- People fixate on weapons, not a person’s appearance
flashbulb memories
FLASHBULB MEMORIES: vivid and detailed emotional memories
- E.g. remembering where you were when you learned about 9/11
Believed to be stable, but how accurate are they?
- There’s a chance for that memory to be corrupted before you recall it again, so not that accurate
language (arbitrariness , purpose)
LANGUAGE: communication system that relies on patterns and rules of symbols (i.e. words or gestural signals)
- Patterns and rules help us organize communication symbols (e.g. pattern of subject + verb + adjective + direct object to describe what people are doing)
- Combines patterns and rules to provide meaning
Language is arbitrary
- the sounds, words, and sentences of language bear no clear relation to their meaning
- symbols dont match objects
- The symbols we use in language don’t always reflect the properties of the concepts we are trying to represent
- e.g. the word dog doesnt describe what a dog looks like or does
Purpose of language is to convey information, socialize, express emotions, create art
language levels (phonemes, morphemes, syntax, extralinguistic information)
- PHONEMES (ingredients)
- Smallest units of sound in a language, produced by vocal apparatus
- Let us make different types of sound that CONTRAST with one another
- Related to sounds and pronunciation of language
- English has about 40-45
- Phonemes correspond to letters in the English alphabet, but a lot are organized by the types of sounds that we have (e.g. the sound “S” is a phoneme that starts the word S, and the sound “oi” is a phoneme but not consisting of a single alphabetical unit)
- Breaking down sounds into individual phenomes is exactly how we can help teach young children to use language and teach ourselves to learn new languages - MORPHEMES (menu items)
- Smallest units of meaning in a language
- Related to meaning and structure of a language
- Created by combining phonemes (more than one phenome is often needed to make a morpheme)
- Can be words themselves or parts of words
- e.g. “ish” “re” “‘cat” “happy”
- E.g. the word cat is broken down into three phonemes: c-a-t. But the word cat is also a morpheme because when putting those phonemes together, which apart they wouldnt have meaning, creates meaning of cat. Also, the letter S is a morpheme because it adds meaning as it signifies a plural. So, cat is a morpheme, and s is a morphine, that combine to create cats
- E.g. the word “play” is a morpheme, but “re” is another morpheme that changes the meaning - SYNTAX (putting the meal together)
- Set of grammar rules used to construct meaningful sentences
- The sentence construction rules make it easy to follow meaning
- E.g. Subject-Verb-Object pattern (“The boy eats the apple” and not “the apple boy eats”)
- Syntax is specific to the language, and languages don’t often share a common syntax - EXTRALINGUISTIC INFORMATION
- Non-verbal and context cues that add meaning to language
- Not part of the language itself but help us interpret the meaning of the language
- i.e. Mannerisms, general body posture, tone of your voice, context of the surrounding situation all factor into how we extract meaning from what a person is trying to communicate
- E.g. “I am refusing this date” can have three meanings based on context (romantic, calendar, fruit) (syntax, morphemes, and phonemes are identical, but extralinguistic information can help determine which it is)
- E.g. “Go clean your room” can have different meanings based on tone of voice
morphemes vs phonemes
phoneme = smallest unit of sound in a language
morpheme = smallest unit of meaning in a language
phoneme = related to the sound and pronounciation of a language
morpheme = related to the meaning and structure of a language
dialect
DILAECT: language variations specific to geographical/ethnic groups
- Dialects aren’t distinct languages, but about variation in pronounciation and word choices
- E.g. people in Boston might have distinct accent compared to other places in North America
- E.g. people might refer to the description of a summer house/hoodie as differen words