Memory Flashcards

(82 cards)

1
Q

What is coding?

A
  • The way in which info is stored/processed into the memory eg. acoustic, visual, semantic
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2
Q

What is capacity?

A
  • A measure of how much info can be held in the memory, in terms of bits of info
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3
Q

What is duration?

A
  • How long a memory lasts in a store, before it is no longer available for recall
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4
Q

Describe Baddleley’s cat/mat experiment?

A
  • 1966
  • Independent group design where each groups lists was different to the other groups list
  • 72 participants
  • Either asked to list the 10 words immediately of 20 minutes after
  • Participants read the words themselves
    -Found:
  • STM codes accoustically as they struggled with similarly sounding words
  • LTM codes semantically as they struggled with words that mean similar
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5
Q

Describe Peterson and Peterson’s experiment?

A
  • 1959
  • Participants were read a nonsense trigram ( 3 consonants with no meaning e.g. LBT )
  • Immediately on hearing the trigram participants have to count backwards in 3’s from a large digit number for a specific time period
  • This time period was called the retention interval and varied from 3-30s, designed to prevent rehearsal of the trigram
  • At the end of the interval participants had to try and recall their trigram
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6
Q

Findings of Peterson and Petersons experiment?

A
  • 3s = 90% trigrams recalled
  • 18s = 10% trigrams recalled
  • 30s = 0% trigrams recalled
  • Without rehearsal, duration of STM is short 18-30s
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7
Q

Describe Bahrick’s experiment?

A
  • 1975
  • 400 participants (17-74) USA
  • Task 1 = free recall, asked to name everyone in their year in high school
  • Task 2 = cued recall, given a set of photos, some of which they went to school with and some they didn’t, asked to recognise the people they knew
  • Task 3 = cued recall, given a set of names ect
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8
Q

Findings of Bahrick’s 1975 experiment?

A
  • Task 1 = free recall was poor for everyone
  • Task 2 and 3 = those who left school up to 15 years ago = 90% correct
  • Those who left school up to 48 years ago = 80% names, 70% faces correct
  • Conclusion - duration of LTM is a lifetime, as long as their are cues to help access them
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9
Q

What is the coding of sensory register?

A
  • Sense specific - the SR simply detects the incoming info rather than trying to decode it
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10
Q

What is the capacity of sensory register?

A
  • Very large
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11
Q

What is the duration of sensory register?

A
  • 250 milliseconds/ 1/4 seconds
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12
Q

What is the coding of STM?

A
  • Acoustically (Badley’s cat mat study)
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13
Q

What is the coding of LTM?

A
  • Semantic (Badley)
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14
Q

What is the capacity of STM?

A
  • 7+/- 2 items
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15
Q

What is the capacity of LTM?

A
  • Unlimited/untestable
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16
Q

What is the duration of STM?

A
  • 18-30 sec (without rehearsal)
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17
Q

What is the duration of LTM?

A
  • Lifetime (with cues)
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18
Q

Describe the MSM?

A
  • In 1968 Atkinson and Shiffrin modelled a representation of human memory
  • Consists of three memory stores linked to each other by the processes that transfer info from one store to another
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19
Q

Describe the case study of KF?

A
  • Shallice and Warrington’s (1970) case study of KF
  • KF’s memory impaired as a result of a motorbike incident when he suffered a brain injury
  • Supports:
  • Separate memory stores in the MSM
  • KF’s STM had a reduced capacity of 1-2 items yet his LTM was fine, showing they must be in separate areas of the brain
  • Challenges:
  • Simplified nature of MSM as his difficulties of STM were only for verbal items, his STM for visual and acoustic items were fine
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20
Q

Describe the case study of Clive Wearing?

A
  • Blakemore’s (1988) case study of Clive Wearing
  • Clive Wearing had almost no LTM since a virus destroyed parts of his temporal lobes but his STM still works fine
  • Supports:
  • Separate stores of MSM
  • His LTM has a reduced function, yet his STM was undamaged, shows they must be located in different areas of the brain
  • Challenges:
  • Simplified nature of MSM - His difficulties with LTM were only for episodic memories, his semantic and procedural LTM’s were still fine
  • This suggests that just one unitary store for all LTM’s irrespective of type is oversimplifying it
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21
Q

Describe the issue and debate for MSM and WMM?

A
  • Machine reductionism
  • Attempts to explain complex behaviours by comparing humans to computers
  • However as memory is complex, highly effected by emotions and motivations, it undermines the complexity of human memory
  • Limits usefulness of MSM in explaining human memory accurately
  • An interactionalist approach including a more holistic view of human memory would make this more valid
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22
Q

Describe WMM?

A
  • Baddeley and Hitch (1974) argued memory was complex for info transfer for LTM
  • Proposed STM should be replaced with WMM
  • Is an active processor of information
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23
Q

What are the main components of WMM?

A
  • Central executive
  • Phonological loop
  • Visuo spatial sketchpad
  • Episodic buffer
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24
Q

Describe the central executive?

A
  • Drives the whole system and allocates data to the subsystems depending on cognitive demands
  • Acts as a filter and determines what info will and will not be attended to
  • Restricts conscious awareness
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25
Describe the visuo spatial sketchpad?
- Rehearses visual and or spatial info, is also called the 'inner eye' - Divided into two stores: - Visual cache - stores visual info e.g. (colour) - Inner scribe - stores info about spatial relationships - Limited capacity but the limits of the 2 systems are independent
25
Describe the phonological loop?
- Processes auditory and verbal info - Two parts: - The phonological store: this component temporarily stores spoken and heard words for a short period of time (the inner ear) - The articulatory process: this component rehearses verbal information and allows it to be stored
26
Describe the episodic buffer?
- Sends info to the LTM - Binds together info from different sources into episodes - Recall's material from LTM and integrates it into STM when working memory requires it (e.g. imagining elephants ice skating)
27
Describe the case study of K.F for WMM?
- Verbal items capacity reduced but not visual - Supports phonological loop and visuo spatial sketchpad as separate stores in different areas of the brain - Lends validity to PL + VSS as part of WMM
28
What are the explanations of forgetting?
- Inference - Retrieval failure
29
What is inference?
- When one memory disrupts our ability to recall another - Only occurs when the 2 memories are similar - The 2 types of inference are retroactive and proactive
30
What is retroactive interference?
- Occurs when newly acquired info inhibits our ability to recall previously acquired similar info - E.g. when you create a new password you are likely to forget the old one
31
What is proactive interference?
- Tendency for previously acquired material to hinder recall of current similar info (the older info will override newer info) - E.g. Entering your old password instead of your current one when you’ve recently changed it
32
Describe McGeoch and McDonalds similarity of items in inference study?
- 1931 - Used for inference as an explanation of forgetting - Changed levels of similarities between two groups and tested their level of recall - Participants originally had to learn a list of adjectives, group one then learnt a list of numbers whereas group 2 learnt a list of other adjectives - Found that group 1 could list more original adjectives - Tells us we are more likely to forget if info is similar - Demonstrates retroactive interference
33
What is retrieval failure?
- Form of forgetting that occurs when we don't have necessary cues to access memory - The memory is available, but not accessible unless a suitable cue is provided - Can be context dependent forgetting or state dependent forgetting
34
What is context dependent forgetting?
- Occurs due to a lack of correct environmental (external) cues - E.g. colours, smells, sounds, temp
35
Describe Godden and Baddeley's underwater divers experiment procedure?
- 1975 - Demonstrates context dependent forgetting - 18 diving club participants took part in a repeated measures designing with 4 conditions - They learn and recall words on different environments - 38 unrelated words which they heard twice during learning stage
36
Godden and Baddeley's (1975) underwater divers experiment findings?
- Around 50% better recall when environment for learning and recall are the same - Shows lack of environmental context cues does negatively affect recall and supports context dependent forgetting
37
What is state dependent forgetting?
- Occurs due to lack of correct internal cues
38
Describe Carter and Cassaday's Antihistamine experiment procedure?
- 1998 - Demonstrates state dependent forgetting - Participants given antihistamine drugs then had to learn list of words/passages and recall in following conditions 1. Learn drowsy, recall drowsy 2. Learn drowsy, recall alert 3. Learn alert, recall drowsy 4. Learn alert, recall alert - Conditions where there was a mismatch between states recalled poorest
39
Issue and debate of retrieval failure studies (context and state dependent forgetting)?
- Weakness is theories are nomothetic - They both use large scale research studies, numerical findings, and propose general laws of behaviour that apply to the population - Not supported by single case studies that would offer descriptive insight into these memory processes - An interaction of both nomothetic and idiographic support for these theories would offer a more valid explanation of forgetting
40
What is schema?
- Mental framework of organizing/interpreting info
41
What are EWT?
- Evidence provided in court by a person who witnessed a crime
42
What are leading questions?
- Questions that make it likely that a participants schema will influence them to give a desired answer
43
What study is used for leading questions?
- Loftus and Palmer (1974) leading questions bumped/smashed experiment - Yuille and Cutshall's (1986) Field experiment involving a real life shooting
44
Describe the Loftus and Palmer leading questions bumped/smashed experiment procedure?
- 1974 - 45 students put into small groups and shown short films involving car accidents - After the film they were asked to estimate the speed of the cars travelling - 5 different conditions were the phrasing of the question was different - The verb differed from words 'smashed', 'collided', 'bumped', 'hit', 'contacted'
45
Describe the Loftus and Palmer (1974) leading questions bumped/smashed experiment findings?
- Found significant differences between average estimations depending on severity of verb - E.g. 'smashed' averaged 40.8mph - 'contacted' averaged 31.8mph - The more extreme the verb the higher average estimation of the cars travelling speeds - Shows leading questions did have an effect
46
Describe Yuille and Cutshall's Field experiment involving a real life shooting procedure?
- 1986 - Suggest EWT is not easily affected by leading questions, misleading info or post event discussion - Involved an investigation into real life shooting incident - A thief stole some money and guns from a shop, the owner managed to free himself and when trying to take the thief's license number, shot and killed the thief in self defence when they thief fired shots at the owner - 21 witnesses observed the incident and were interviewed by the police, 13 agreed to a research interview 4-5 months after the incident to test effects of post event discussion - Researchers also asked leading and misleading questions based on Loftus's research
47
Findings of Yuille and Cutshall's (1986) Field experiment involving a real life shooting?
- Found most witnesses were highly accurate in accounts and there was little change in accuracy of recall over 5 month period - Shows leading questions, misleading info and post event discussion has no effect on real life witnesses accounts, showing memory experiments in labs have low ecological validity
48
What is the issue and debate for leading questions and post event discussion?
- Research examining the EWT is an example of experimental reductionism as it attempts to explain complex behaviour by relying on isolated variables, operationalised in a lab experiment - However, as memory is complex, many psychologists argue reducing memory to isolated variables undermines complexity of human memory and of memory in an everyday context - Limits usefulness of EWT in explaining human memory accurately - Using an interactionalist stance including a more holistic approach would be more valid
49
What is post even discussion?
- A conversation after an incident has occurred that may alter a witnesses memory - Info may be added to memory after the event has occurred - E.g. discussing what you have seen with other people
50
What study is used to challenge post event discussion?
- Yuille and Cutshall
51
What is Yerkes - Dodson inverted U hypothesis?
- States anxiety has a negative effect of accuracy on EWT when it is at very low/high levels, but moderate levels are more beneficial to the accuracy as adrenalin can sharpen senses and create clearer memories
52
What cases show negative effects of anxiety?
- Loftus and Palmers car crash study - low levels of interest/anxiety caused by just watching cars on a small screen at the front of a lab led to a poor recall accuracy and easily distorted memories - Johnson and Scotts weapon effect experiment
53
What shows the positive effects of anxiety?
- Yuille and Cutshall (1986)
54
Explain weapon focus?
- When a crime involves a weapon this creates anxiety - Witness will use selective attention to focus on weapon rather than on criminal or other details of the event - This reduces accuracy of eye witness recall
55
Describe the procedure of Johnson and Scott's weapon effect experiment?
- 1976 - Participants waited outside in a lab overhearing exchange in a room - In one condition a man stormed out holding a pen whilst in the other they hear a heated exchange and a man comes out holding a bloody knife - Participants later asked to identify person
56
Findings of the procedure of Johnson and Scott's 1976 weapon effect experiment?
- Pen condition was more accurate in recognising the man - 49% in pen compared too 33% in knife - Shows anxiety from weapon reduces attention and lowers accuracy
57
Issue and debate for anxiety on EWT?
- Weakness is it is reductionist - This theory centres on role of emotions on EWT accuracy - Ignores other factors e.g. age - It is known that very young/old people struggle to recall detail and anxiety affects people in different ways if they have anxiety disorders or a low tolerance of anxiety - An interactionalist stance combing a reductionist theory with a more holistic explanation would be more valid
58
Describe the cognitive interview?
- Fisher and Geiselman (1992) argued EWT could be improved if police used better techniques when interviewing witnesses - The techniques based on existing theories of memory and forgetting
59
What is enhanced cognitive interview?
- Additional elements of cognitive interview: - Reducing anxiety - Minimising distractions - Asking witnesses to speak slowly
60
What are the 4 techniques used in the cognitive interview?
- Report everything - Change order - Reinstatement of context - Change perspective
61
Describe report everything?
- Witnesses encouraged to include every detail of the event (incusing their own thoughts and feelings) even if it may seem irrelevant - May trigger other important memories encoded with the state cues
62
Describe change order?
- Recall events of crime in a different order e.g. backwards - This will remove expectations and gap filling of a story told in order that should flow
63
Describe reinstatement of context?
- Returning to the scene of the crime (to use context and state cues available) - Or to imagine being back at the scene of the crime (mental reinstatement)
64
Describe changed perspective?
- Recall the incident from someone/something else perspective at the scene of the crime - Another way of disrupting a persons schema
65
What are the differences between standard and cognitive interviews?
- Cognitive: - More cues - Schemas removed - Longer interview with specially trained interviewee - Less practical
66
Describe the Fisher and Geiselmans use of cognitive interview experiment?
-16 police interviewers conducted 2 interviews on 47 witnesses - All first interviews given standard police interviews, group 1 given another one, group 2 then given a cognitive interview - IV was type of second interview used - Found cognitive interview obtained 47% more facts
67
What year was Baddeley's cat/mat study?
- 1966
68
What year was Peterson and Peterson's trigram experiment?
- 1959
69
What year was Bahrick's high school book experiment?
- 1975
70
What year did Atkinson and Shiffrin model human memory?
- 1968
71
What year and name was the study of KF?
- Shallice and Warrington - 1970
72
What year and name was the study of Clive Wearing?
- Blakemore - 1988
73
What year did Baddeley and Hitch propose the WMM?
- 1974
74
What year was McGeoh and McDonald's similarity of items of inference experiment?
- 1931
75
What year was Godden and Baddeley underwater divers experiment?
- 1975
76
What year was Carter and Cassady's antihistamine experiment?
- 1998
77
What year was Loftus and Palmers leading questions experiment?
- 1974
78
What year was Yuille and Cutshall's real life shooting experiment?
- 1986
79
What year was Johnson and Scott's weapon experiment?
- 1976
80
What year did Fisher and Geiselman propose the cognitive interview?
- 1992
81
What year was Fisher and Geiselman's use of cognitive interview experiment?
- 1989