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Summary - Unit 2 - Cognitive psychology

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Summary notes for Alevel Edexcel cognitive psychology. Notes consist of A01, A02, A03 and Ao3CA points. Description of point, evidence for point, evaluation and evaluation of the counterargument. Summary points include required studies and led to me achieving an A in Alevel Psychology. Content in...

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  • August 5, 2024
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  • 2021/2022
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Cognitive psychology- Theories and applied studies
MULTISTORE MODEL- Atkinson and Shiffrin

A01

o Sensory memory – brief, modality specific, limited duration, lost by lack of attention
o STM- capacity 7±2 , duration 15-30 seconds without rehearsal, increase by chunking,
encodes acoustically, lost by displacement of info, trace decay, interference, or lack of
rehearsal
o LTM- infinite capacity and duration, encodes semantically, lost by trace decay or
interference
o Linear, unitary stores

A03

- Sperling1960- grid of letters, asked to recall, couldn’t recall all but aware there were more
letters proving sensory memory
- Millers digit span test- could recall 7±2 in STM
- Brown Peterson- counted backwards in 3s to prevent rehearsal proves STM duration 15-30
seconds and loss of information via displacement
- Bahrick- could recall names from school from yearbooks 48 years later, proves LTM infinite
capacity
- Mirror drawing tasks- HM lost STM yet improved at mirror drawing task suggesting different
types of LTM stores (procedural memory) MSM is overly simplified
- Case studies- KF motorbike accident- 2 numbers in digit span test, proves separate stores as
STM impaired yet LTM fine
- Brain scanning- sperate parts of the brain active during different memory tests

A03CA

- Brandimonte et al- visualising improves STM recall suggests STM doesn’t just encode
acoustically also visually, MSM overly simplified
- Dual task activities- suggests multiple parts to STM and that memory doesn’t flow in a linear
way
- Flashbulb memories- powerful memories don’t require rehearsal to get into LTM
- Cant fully test if LTM has in infinite capacity, might have a limit
- Case studies- lack of reliability so hard to replicate and cannot compare to how they were
before the accident, brain can adapt due to plasticity

WORKING MEMORY MODEL- Baddeley and hitch

A01

o Central executive- decides which store to assign info to, processes small amounts of
information
o Episodic buffer- temporary memory store, holds 1 piece of information from STM/LTM
o Phonological loop- limited capacity, holds verbal information, ‘inner voice’- subvocalizes
information
o Visuo-spatial scratchpad- limited capacity, holds visual/ spatial info, inner scribe-
arrangement of items, visual cache- info of visual items like colour

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