Cognitive approaches to psychology Flashcards
Models of memory
- Multi-store model of memory
2. Working memory model
Multi-store model of memory (MSM)’s creator + year
Atkinson & Shiffrin 1968
Multi-store model of memory’s concept
o 3 stores of memory (sensory memory, STM & LTM)
o All differs in encoding, capacity, and duration
1. Sensory memory:
- Encodes: pays attention to the five sensory
information, if not, it decays, if there’s attention
given it moves into STM
- Capacity: very limited
- Duration: very limited
2. Short-term memory:
- Encodes: rehearsal of information, if not, it’s
forgotten or displaced, if there’s enough rehearsal
it moves into LTM
- Capacity: limited in 7 +/- 2 chucks of information
- Duration: approx. 30 seconds without rehearsal
3. Long-term memory:
- Capacity: unlimited
- Duration: unlimited
Glanzer and Cunitz’s year
1966
Glanzer and Cunitz’s aim
to investigate how filler task would affect the serial positioning effect
Glanzer and Cunitz’s sample
46 army enlisted men
Glanzer and Cunitz’s method + procedure
Experiment w/ repeated measures
- Researchers read out a set of 5 words in three recalling conditions
- They had to do a free recall task, immediately, 10 sec filler task & 30 sec filler task
Glanzer and Cunitz’s findings
o Immediately recalling showed both signs of serial positioning effect (Primacy effect - recalling as the individual is able to rehearse and repeated the word enough to transfer it from STM to LTM store. Recency effect - recalling due to it being the last word that was given attention to, which is still active within the STM store.)
o Filler tasks only showed signs of primacy effect (as the information had already been transferred to LTM store, which prevented it from decaying, while the words at the end of the list decayed as the STM store was unable to continuously perform rehearsal)
o This effect was more significant in the 30 sec filler task condition
Glanzer and Cunitz’s evaluation
+ The study supports the idea of multiple stores (STM and LTM stores)
+ Provides the duration of information that stays in the STM store without rehearsal (~30 seconds)
- Controlled lab study + highly controlled variables, but there is no random allocation of participants to experimental conditions so it is not a true experiment.
- Low ecological validity (participants aren’t usually given a list of 5 words to remember without additional purpose given to remembering it)
- Small + culturally specific sample = low generalizability to other populations
H.M Milner’s year
1966
Milner’s aim
to better understand the effects that the surgery (which removed parts of his hippocampus) had had on patient HM
Milner’s sample
H.M (suffered from severe seizures => medial temporal lobe + hippocampus region got removed
Milner’s findings
o H.M was unable to acquire new episodic memory of events and semantic knowledge about the world.
o Unable to transfer knowledge from STM to LTM
o Hippocampus area is responsible of the formation of memories
o H.M still retained procedural memories (i.e how to ride a bike)
Milner’s evaluation
+ provided detailed qualitative information and insight
+ permitting research on unethical situation
+ high ecological validity (no variables were manipulated and HM was observed in his natural environment)
- unable to generalize the results
- difficult to replicate the procedures
- researcher bias
- time-consuming
Multi-store memory model’s evaluation
+ Large based research supporting the concept of distinct stores (e.g STM store and LTM store)
+ Suggests an explanation of how memory is encoded and displaced/ decayed
- Oversimplifies the process of memorizing information
- Assumes there are only 3 stores, there could be more than 3
- Procedural memory (e.g how to ride a bike) isn’t encoded systematically
- Vagueness surrounding the capacity and duration that LTM store has
- Doesn’t explain memory distortion
- Doesn’t explain the ability to do
Working memory model’s year + creator
1974, Baddeley and Hitch
Working memory model’s concept
A more specific and better model to understand the components of the STM store.
Consists of 4 elements:
1. Central executive - in charge of allocating
resources between visuospatial sketchpad and
phonological loop
2. Visuospatial sketchpad - holds visual and spatial
resources/ information
3. Phonological loop - holds auditory information
(Inner ear - holds sound passively + inner voice -
re-words audio prolonging memory)
4. Episodic buffer - integrates information from
sketchpad and loop into LTM
Baddeley & Hitch’s year
1976
Baddeley & Hitch’s aim
to investigate whether individuals can use different parts of the working memory model at the same time
Baddeley & Hitch’s sample
12 people
Baddeley & Hitch’s method + procedure
Experiment
1. Asked the participants to perform two tasks simultaneously
o digit span task - repeating list of numbers
(increasing)
o verbal reasoning - answering true or false
questions
Baddeley & Hitch’s findings
o Participants could use different parts at the same time (phonological loop - activated to perform digit span task while the central executive activated the reasoning and logical processing)
o Despite small delays there were no errors
Baddeley & Hitch’s evaluation
+ easily replicated which would increase the reliability of the results
+ Participants had inform consent
- No external variables were controlled (e.g age, IQ score)
- Can’t generalize the findings
- Small sample size
- Low ecological validity due to the lab environment
Working Memory Model’s evaluation
+ Explains parallel processing/ doing 2 things simultaneously
+ Model is based on evidence from lab experiments, which controlled for confounding variables
+ Brain scans showed there’s different parts that the brain uses for verbal and visual tasks
- Too simplistic and vague (the function of central executive is unclear)
- Lab experiment has low ecological validity which doesn’t represent everyday life
- Doesn’t explain memory distortion or how emotion affects memory