Explanations for Forgetting Flashcards
2 types of forgetting
interference
retrieval failure
2 types of interference
proactive and retroactive
proactive interference
old memories prevents formation or recall of new memories smilar to it
retroactive interference
new info disrupts recall of older memories associated with or similar to it
McGeoch and McDonald studied…
…effect of similarity of learned material on retroactive interference
McGeoch and McDonald
- P’s learned list of 10 adjectives to 100% accuracy of recall
- then learned another list of 10 words, ranging from synonyms of first to numbers
- tested on original list
- if 2nd ist synonyms, did worst
- if numbers, did best
- shows retroactive interference increases with similar memories
Tulving and Psotka studied…
…whther interference is temporary and can be overcome by cues
tulving and Psotka
- gave P’s lists of words organised into categories, 1 list at a time and asked to recall them
- recall avg of 70% for 1st list, getting worse with each list
- then given a recall test and told the categories.
- recall increased to 70% again
Baddeley and Hitch investigated…
interference in everyday life
Baddeley and Hitch
- had rugby players recall names of teams they’d played against that season
- found recall better for those who’d missed 1 or 2 games than those who’d not
- suggests interference reason ore regular players did worse as more info that can interfere with recall
Tulving and Psotka showed…
limitation of interference as shows only temp loss of access to info in LTM
evaluation of McGeoch and McDonald
- type of expt replicated many times
- used word list more relevant to everyday life than trigrams, but not as realistic as names/faces
- doesn’t sho how interference affects episodic memory or memories of faces
potential CV’s of Baddeley and Hitch
- similarity of team names
- individual differences in memory of players
retrieval failure
info can’t be recalled because don’t havee suffient cues to enable retrieval from LTM, despite info stored and therefore available
explanations of forgetting evaluation
similar categories tackle context of sedation
cues
triggers, often coded at the time of learning, which allow us to access info
can be internal or external
e.g of internal cue
mood
e.g. of external cue
physical location
encoding specificity principle
suggest cues must be present at the time of learning (encoding) and at time of retrieval (recall) if they are to help us recall
context dependent forgetting
recall depends on external cues
if environment of recall different to taht of encoding, we are unable to recall
state dependnt forgetting
recall depends on internal cues
summary of Godden and Baddeley
- had 1 group of divers learn words on land and another group learn them under water
- had 1/2 of each group recall words on land and other 1/2 underwater
- those who learned and were tested in same environment recalled 40% more words than those who’d done so in different environments
explain the findings of Godden ad Baddeley
the external cues (environment) when learning the words were different to those present at recall, so led to retrieval failure
summarise Carter and Cassaday
- 1 group learned words after taking a sedative and another group without the sedative
- 1/2 of each group tested, either with or without sedative
- those who were tested in different state to learned did significantly worse than those who were tested in the same state