Module 2: Memory Flashcards
What are the three stages of information processing?
Input (through senses), encoding (storing info in electrochemical memory trace), and output (retrieval of memory)
What are the three main types of encoding?
Acoustic encoding, visual encoding, and semantic encoding (meaning of information)
What are the characteristics of short-term memory?
Duration: 18secs, rehearsed info for minutes (may be transferred to long term)
Capacity: 7 items
Forgetting: Displacement
What are the characteristics of long-term memory?
Duration: Minutes to lifetime
Capacity: Unlimited
Forgetting: Memory decay, interference, retrieval failure
What are the different types of forgetting?
- Displacement (capacity exceeded, new info pushes out old)
- Memory decay (trace eroded over time)
- Interference (trace over-written with new info)
- Retrieval failure (memory cannot be found)
Define amnesia
Memory loss due to accident, disease or injury
What are the characteristics of anterograde amnesia?
- Unable to form new long term memories
- Long term memories before damage retained
What are the characteristics of retrograde amnesia?
- Cannot recall memories before damage
- Can be specific memory, time frame, or whole identity
- Possible to regain memories
Describe Bartlett’s (1932) Theory of Reconstructive Memory
- Active reconstruction: memories as notes, upon recall details filled in with schemas
- Schemas: an expectation, influences perspective, built up over life through personal experiences
- Recall displays FORT (familiarisation, omission, rationalisation, transformation)
Explain the ways Bartlett’s theory describes the reconstruction of recalled memories
FORT:
- Familiarisation: changing unfamiliar details to align with schema
- Omission: unfamiliar, irrelevant or unpleasant details omitted/simplified
- Rationalisation: details added to make sense of details that did not fit with a schema
- Transformations: details changed to make them more familiar/rational
Give strengths of Bartlett’s (1932) Theory of Reconstructive Memory
- Practical applications: eye witnesses to crime given cognitive interview (designed to avoid omissions/transformations)
- Ecologically valid (study done on real uses of memory)
Give weaknesses of Bartlett’s (1932) Theory of Reconstructive Memory
- Findings subjective (Bartlett’s own interpretations), therefore unscientific
Describe Atkinson and Shiffrin’s (1968) Multi-Store Model of Memory
- Sensory register: held for <1sec, put into short-term if payed attention to
- Short-term: Stored for 15-30secs (maintained longer if rehearsed), modality-free (not linked to senses), only transferred to long-term if rehearsed
- Long-term: held indefinitely, potentially unlimited capacity, organised semantically
Give evidence of Atkinson and Shiffrin’s (1968) Multi-Store Model of Memory
Evidence:
- Amnesia (retrograde/anterograde difference)
- Murdock’s (1962) study - found words at beginning & end of list remembered more than middle
Give weaknesses of Atkinson and Shiffrin’s (1968) Multi-Store Model of Memory
- Overstating role of rehearsal (non-rehearsed meaningful info still recalled)
- More than one type of long-term memory (events vs skils)