Memory Revision Cards
- Created by: millywhitehouse
- Created on: 14-12-20 10:07
AO1 Short and Long Term Memory: Capacity
Jacobs - digit span 9.3 for digits, 7.3 for letters
Miller - people remember about 7 items and 7 chunks
AO3 Short and Long Term Memory: Capacity
Cowan - 4 chunks probably the limit. Same for visual information (Vogel et al)
Simon - larger chunks mean fewer recalled
Jacobs - 19 year olds have a longer digit span than 8 year olds
AO1 Short and Long Term Memory: Duration
Peterson and Peterson - used consonant syllables, prevented verbal rehearsal. STM lasted 18 seconds
Bahrick et al - after 48 years participants were 70% accurate in face recognition of classmates and 30% for names
AO3 Short and Long Term Memory: Duration
Consonant syllables not meaningful but some memory activities do involve such stimuli
Reitman - auditory tones to avoid displacement, led to longer duration of STM
Naime et al - duration of STM 96 seconds
AO1 Short and Long Term Memory: Coding
Baddeley - difficulty remembering acoustically similar words in STM but not in LTM, reverse for semantically similar words
AO3 Short and Long Term Memory: Coding
In Baddeley's study, LTM was tested by waiting 20 minutes, not really LTM
Brandimote et al - STMs visually coded if verbal rehearsal was prevented
Wickens et al - STM sometimes uses a semantic code
Frost - visual coding in LTM
Nelson and Rothbart - acoustic coding in LTM
AO1 The Multi-Store Memory Model
Sensory register - large capacity very short duration (milliseconds)
Attention transfers information from sensory register to STM
STM - limited capacity (5 items/chunks) so information decays, limited duration (a few minutes) unless rehearsed
Maintenance rehearsal eventually creates a LTM
LTM - potentially unlimited capacity and duration, forgetting may be due to lack of accessibility
Retrieval from LTM goes through STM
AO3 The Multi-Store Memory Model: Strengths
STM/LTM difference supported by:
Lab studies e.g Jacobs, Miller, Peterson and Peterson, Bahrick, Baddeley
Brain scans e.g Baddeley linked STM to prefrontal cortex, Squire linked LTM to hippocampus
Case study of HM - linked formation of new LTMs to hippocampus (Scoville and Milner)
AO3 The Multi-Store Memory Model: Limitations
MSM is too simples, STM and LTM are not unitary stores
LTM involves elaborative rather than just maintenance rehearsal
STM is not independent of LTM - Ruchkin et al showed different brain activity for words and pseudo-words
AO1 The Working Memory Model
Central Executive (CE) acts as 'attention', allocates tasks to slave systems, no storage
Phonological loop (PL) preserves order of auditory information: phonological store holds the words for PL (inner ear), articulatory process performs maintenance rehearsal for PL (inner voice)
Visuo-spatial sketchpad (VSS) for planning and processing visual and/or spatial tasks: visual cache for form and colour, inner scribe for spatial relations
Episodic buffer records events as they happen, links to LTM
AO3 The Working Memory Model: Strengths
Hitch and Baddeley - participants slower when doing dual tasks (CE + articulatory loop). Demonstrates CE
KF - damage to PL, problems with verbal material (words not sounds) (Shallice and Warrington)
SC - damage to PL, unable to learn word pairs presented out loud (Trojano and Grossi)
LH - damage to spatial system (Farah et al)
Word length effect - longer words can't be rehearsed (supports phonological loop), articulatory suppression task cancels out word-length effect (supports articulatory process)
AO3 The Working Memory Model: Limitations
CE doesn't explain anything and more complex than currently represented, evidence from EVR (Eslinger and Damasio)
Brain damage evidence unreliable because trauma may cause problems
AO1 Types Of LTM
Episodic memories - personal memories for events forming a sequence. They may include details of context and emotion
Semantic memories - knowledge shared by everyone, abstract and concrete. They are acquired through episodic memories
Procedural memories - knowing how to do something. They become automatic through repetition and are disrupted if you think about them
AO3 Types Of LTM
Episodic memories associated with temporal lobe including hippocampus plus frontal lobe
Semantic memory associated with temporal lobe
Procedural memory associated with cerebellum and basal ganglia and limbic system
HM - new procedural memories could be formed but not semantic and episodic ones
Evidence from amnesia patients - semantic memories can form independently of episodic memories
Brain damage evidence unreliable because can't be certain that causal part of the brain identified
Perceptual-representation system may be a kind of implicit memory related to priming
AO1 Explanations for Forgetting: Interference
Retroactive interference - old interferes with new
Muller and Pilzecker - recall was less good if there was an intervening task (describing paintings)
Proactive interference - new interferes with old
Underwood - analysed many studies, the more lists learned from the lower percentage of recall
McGeoch and McDonald - learn list of words + list of synonyms > 12% recall, learn lists of words + lists of digits > 37% recall. Similarity matters
Baddeley and Hitch - rugby players who played fewer games had better recall of teams played against (less interference)
AO3 Explanations for Forgetting: Interference
Artificial research - words and nonsense syllables, and low motivation. Doesn't represent everyday memory
Limited to some situations of forgetting, where two sets of stimuli are quite similar
Ceraso - spontaneous recovery of recognition memory after interference suggests memories are available but not acceptable
Real world application - competing advertisements reduce their effect because of interference, better to show three in one day (Danaher et al)
Individual differences - people with greater working memory span less susceptible to proactive interference
AO1 Explanations for Forgetting: Retrieval Failure
Encoding specificity principle - material present at encoding is present at retrieval (Tulving and Thomson)
Tulving and Pearlstone - category + word learned. Free recall was 40%, cued recall was 60%
Some cues are not meaningfully linked at encoding but also act as cues
Context-dependent forgetting - Abernethy - recall best with same instructor in same room
Context-dependent forgetting - Baddeley and Godden - recall best when initial context (land or water) matched recall environment
State-dependent forgetting - Goodwin et al - recall best when initial state (drunk or sober) matched state at recall
AO3 Explanations for Forgetting: Retrieval Failure
High validity - wealth of supporting research in both lab and natural experiments
Real world application - to revising and the cognitive interview
Cues don't always work - not useful when learning meaningful material (SMoth and Vela)
Encoding specifically is circular - it is not a casual relationship (Nairne) and cannot be tested (Baddley)
Retrieval failure can explain interference effects and thus is more important explanation of forgetting
AO1 Accuracy of Eyewitness Testimony: Misleading I
Leading questions suggest the desired answer
Loftus and Palmer - critical question containing hit, smashed, collided, bumped or contacted, spread estimates were highest with the word smashed
Loftus and Palmer - the verb altered the actual memory of the event, participants more likely to report broken glass
Post-event discussion may contanimate eyewitness memory of an event
Conformity effect - particpipants' recollection influenced by discussion with others (Gabbert et al)
Repeat interviewing - especially problematic with a child witness (LeRooy et al)
AO3 Accuracy of Eyewitness Testimony: Misleading I
Braun et al - misleading information (Bugs Bunny) altered participant recall
Real life EWT may be more accurate - lab studies not taken seriously
Foster et al - film of supposed robbery, high accuracy
Yullie and Cutshall - witnesses to real crime fed misleading information but still accurate recall
Real world application - mistaken EWT largest factor of innocent people (Wells and Olson)
Individual differences - misinformation effect in older people, thus more susceptible to misleading information
Response bias - recalling events in original order led to recovery of recall so memory not altered (Bekerian and Bowers
AO1 Accuracy of Eyewitness Testimony: Anxiety
Stress (psychological arousal) reduces performance on complicated cognitive tasks
Johnson and Scott - weapon focus effect reduces accuracy of face identification
Loftus et al - monitored eye movements during weapon exposure, focus was on weapon
Evolutionary argument - it is adaptive to remember stress-inducing events
Christianson and Hubinetter - high-anxiety victims (bank tellers) remember most accurately
Deffenbacher et al - Yerkes_dodson effect explains high accuracy at moderate levels of anxiety and low accuracy when anxiety is high (or low)
AO3 Accuracy of Eyewitness Testimony: Anxiety
Pickel - weapon focus effect due to surprise not anxiety
Deffenbacher et a - real life studies show even less accuracy than lab studies, so lab findings actually underestimate the effects of anxiety
Halford and Milne - kind of crime effects accuracy, e.g victims of violent crime are more accurate than non violent crime
Bothwell et al - neurotic patients become less accurate with increasing anxiety, opposite true for emotionally more stable patients
Deffenbacher - catasrophe model better than inverted U
AO1 Accuracy of Eyewitness Testimony: The Cognitiv
Based on psychological research:
- Mental reinstatement of original context - physical and psychological, cued recall
- Report everything - even seemingly insignificant details, may cue recall
- Change order, reduces effect of schemas
- Change perspective, disrupts schemas, supported by Andersons and Picherts study (burglar and House buyer perspective)
AO3 Accuracy of Eyewitness Testimony: The Cognitiv
Kohnken et al - review of 53 studies, 34 more information from CI, but lad studies with students
Milne and Bull - effectiveness may be due to 'report everything' and 'mental reinstatement' components
Quality may suffer - 81% increase in correct recall but 61% false positives (Kohnken et al)
Police dislike CI - time consuming, inadequate training
Comparisons difficult - older adults' memories helped more by the CI than younger adults (Mello and Fisher
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