Memory Flashcards
What was the aims and procedures of Baddeley’s coding study ?
(Coding, Capacity & Duration)
Aim - to know what format memory is stored in in the different memory stores
Procedure - Gave different lists of words to four groups of participants
Group 1 - Acoustically similar - words that sound similar
Group 2 - Acoustically disimilar - words that sound different
Group 3 - Semantically similar - words with similar meanings
Group 4 - Semantically disimilar - words with different meanings
What were the findings of Baddeley’s coding study ?
(Coding, Capacity & Duration)
1) When recall completed immediately after hearing words
Ps did worse with semantically similar words
Conclusion - Information is coded acoustically in STM
2) When recall completed after 20 minutes
Ps did worse with acoustically similar words
Conclusion - Information is coded semantically in LTM
Means little in everydat life - cannot generalise to different tasks
Evaluation - Limitation - Use of artificial stimuli ?
(Coding, Capacity & Duration)
Point - Words used had no meaning to participants so this tells us little about coding for everyday tasks
Further - this means we should be cautious about generalising the findings to different kinds of memory tasks
How did Jacobs research capacity and what did he find ?
(Coding, Capacity & Duration)
Jacobs developed a technique to measure digital span:
P given 4 digits and asked to recall in correct order out loud
If correct given 5 digits and so on until P can’t recall the order correctly
This determines digital span
Findings - Mean span for digits was 9.3. Mean span for letters was 7.3
How did Miller research capacity and what did he find ?
(Coding, Capacity & Duration)
Miller - observed everday practice
Memory Span in STM - STM is about 7 items (plus or minus 2)
Chunking - can recall 5 words as well as they can 5 letters by chunking – grouping sets of digits or letters into units or chunks
Cowan STM is 4 chunks - Simon shorter memory larger chunks
Evaluation - Capacity - Limitation - STM may be shorter than originally claimed ?
(Coding, Capacity & Duration)
Point - Cowan reviewed research from other psychologists and found that the STM is shorter than miller claimed. He concluded the capacity of STM was only about 4 chunks
Further - Simon found that people had a shorter memory for larger chunks, such as eight-word phrases
Explain Peterson and Peterson’s study into the duration of the STM and the findings ?
(Coding, Capacity & Duration)
Peterson and Peterson - Ps took part in 8 trials
On each trial, P given consonant syllable to remember and 3 digit numbers
P asked to count backwards from the 3-digit number until told to stop – this was to stop the Ps mentally rehearsing the consonant
On each trial, told to stop at a different time – 3, 6, 9, 12, 15 or 18 seconds – called the retention interval
Conclusion - STM has very short duration unless we repeat something over and over again via verbal rehearsal
What was the procedure, findings and conclusion of Bahrick et al’s duration of LTM study ?
(Coding, Capacity & Duration)
Procedure -
studied Ps between 17-74 years old
Obtained high school year books
Recall tested by:
Photo-recognition test of 50 photos from Ps’ yearbooks; and
Free recall test where Ps recalled all the names of their graduating class
Findings - Ps who were tested within 15 years of graduation were 90% accurate in photo recognition and 60% in free recall
After 48 years recall fell to about 70% for photo recollection and 30% in free recall
Conclusion - Shows LTM memory can last a very long time, up to a whole lifetime
doesnt reflect real life - Bahrick et al LTM study used real-life means
Evaluation - Limitation - Artificial stimulus ?
(Coding, Capacity & Duration)
Peterson and Peterson’s study uses artificial stimulus, this doesnt refelct real life memory activities where we attempt to memorise more meaningful things - lacks mundane realism
Counter - Bahrick et al’s study into LTM used real-life meaningful memories providing higher external validity
What is the multi store model ?
(Multi-Store Model)
Atkinson and Shriffin’s multi-store model describes how information flows through the memory system
Suggests memory is made up of three stores (Sensory Register, STM and LTM)
Draw the multi store model ?
(Multi-Store Model)
How does the sensory register work ?
(Multi-Store Model)
Stimulus from environment will pass in through the sensory register
Duration of material in the sensory register is less than half a second
They have an unlimited capacity
Information only passes further into MSM if you pay attention to it
Two main stores of sensory register
Iconic memory – visual information, coded visually
Echoic memory – audio information, coded acoustically
How does the STM work ?
(Multi-Store Model)
Capacity - 7 + or - 2
Coding - Acoustic
Duration - 30 seconds unless rehearsed
To keep information in the STM, we perform maintenance rehearsal
Prolonged Rehearsal - If we rehearse it long enough it passes into LTM
How does the LTM work ?
(Multi-Store Model)
Capacity – Psychologists believe it has unlimited capacity
Coding - Semantic
Duration - Potentially permanent, if rehearsed
Retrieval - Material is stored in LTM but when we want to recall it, it has to be transferred back into STM by a process called retrieval
STM and LTM mix ups different - brain scan Beardsley activation brain
Evaluation - Strength - Research support that STM and LTM are seperate ?
(Multi-Store Model)
Point - Baddeley’s research on coding, shows we mix up words that sound similar in STM and mix up words with similar meanings in the LTM - shows that the STM and LTM are different
Further - studies using brain scanning techniques demonstrate there is a difference between STM and LTM . Beardsley found that prefrontal cortex active during STM tasks but not LTM tasks
WMM different STM stores - More than 1 type of LTM
Evaluation - Limitation - More than one type of STM ?
(Multi-Store Model)
Point - The working memory model shows the STM is dividsed into a number of different stores with different capacities, durations and coding for each
Further - Research shows there is more than one type of LTM. We have different stores for our memories about the world and our memories for how to do things
Logie states STM relies on LTM - MSM reductionist
Evaluation - Limitation - The STM and LTM may not be seperate ?
(Multi-Store Model)
Point - The MSM suggests the STM is involved before LTM. Logie states that the STM relies on the LTM and therefore cant come first
I&D - The MSM is reductionist and oversimplifies the memory structures and processes and focuses on the STM and LTM as seperate entities, they should take a more holistic view
What are the 3 stores for LTM ?
(Types of Long Term Memory)
Episodic memory
Semantic memory
Procedural memory
What is the episodic store for memory ?
(Types of Long Term Memory)
Episodic - Our ability to recall events
Memories are time stamped
Remembers the details, context and emotions
Have to make a conscious effort to recall
What is the semantic store for memory ?
(Types of Long Term Memory)
Semantic - Facts about the world
Contains a lot of concepts and is constantly added to
Memories are not time stamped
Information is less personal
What is the procedural store for memory ?
(Types of Long Term Memory)
Procedural - Our memory for skills
Muscle based memory
Acquired through repetition and practice
We find it difficult to explain to people how to perform them
HM unable to form new episodic other stores intact - idiographic
Evaluation - Strength - Supporting clinical evidence ?
(Types of Long Term Memory)
Point - Case study of HM whom underwent surgery for epilepsy whereby he was unable to form new episodic memories but was still able to remember procedural task and semantic memory seems unaffected
I&D - as these case studies focus on one P, it takes an idiographic approach, this means meaningful generalisations cannot be made
Tulving PETscan different parts of brain dif memories - bio-reductionist
Evaluation - Strength - Supporting evidence from brain scans ?
(Types of Long Term Memory)
Point - Tulving et al got Ps to perform different memory tasks while brains were scanned using a PET scanner. Found episodic and semantic memories were both recalled from different hemispheres of the brain. Shows different types of memory are stored in different parts of the brain
I&D - Tulving’s research is biologically reductionist and it localises types of LTM to specific regions of the brain. Fails to take account of all the different biological and cognitive processes involved
Memory loss old = episodic - Belleville intervention episodic memory
Evaluation - Strength - Real life application ?
(Types of Long Term Memory)
Point - Memory loss in old age is specific to episodic memory
Further - Belleville et al devised an intervention for older people targeting episodic memory, which improved their memory compared to a control group
Draw the working memory model ?
(Working Memory Model)
What is the working memory model ?
(Working Memory Model)
Explanation of how the STM is organised and functions
Concerned with the part of the mind that is active when temporarily storing or manipulating information
What is the role of the central executive ?
(Working Memory Model)
monitors incoming data, it is involved in decision making and allocates ‘slave systems’ to tasks
Has a very limited capacity
Doesnt code information
What is the role of the phonological loop ?
(Working Memory Model)
One of the slave systems
Deals with auditory information
Preserves the order in which information arrives
Divides into:
Phonological store - stores words you hear
Articulatory control system - allows for maintenance rehearsal
Acesses LTM to store and retrieve information about language stores
What is the role of the visuo spatial sketchpad ?
(Working Memory Model)
Stores visual/spatial information
Logie subdivided into:
Visual cache - stores visual data
Inner scribe - records the arangements of objects in the visual field
Accesses the LTM to store and retrive visual-spatial information
What is the role of the episodic buffer ?
(Working Memory Model)
Temporary store for information
Integrates visual, spatial and verbal information
maintains a sense of time sequencing
Sends information to the LTM