memory -EWT Flashcards
WHAT IS EYEWITNESS TESTIMONY
EWT refers to the description given by people of an event they have have experineced , e.g robbery , identification of people , weather conditions
what are factors that affect EWT ?
Misleading infos - incorrect infos given to eyewitness after the the event
what are two types of misleading infos
post even discussion - when there’s more than one witness to an event , and these discuss what they have seen with each other or others . (gabbert et la)
leading questions - questions that will influence participants schema to give a desired answer( loftus and palmer )
outline loftus and palmer study
AIM : To investigate the effect of ppts hearing a different words when asked about thier memory of a car crash
procedure :45 American students
ppts watched c lip of car crash and asked a question about the speed of car were travelling
5 conditions , hit smashed ,collided ,hit ., knocked , bumped
‘how fast they were they going when they hit ‘
different verbs used (iv)
findings :the estimated speed was affected by the verb used .
contacted =31.8mph
hit=34.0mph
bumped=38.1mph
collided=39.3mph
smashed=40.8mph
conclusions :the accuracy of ewt is affected by leading questions ewt may not be reliable .
who’s a reasercher for post even discussion ?
gabbert et la
71% mistakenly recalled items they didn’t see in a video but picked it up from their partner
each partner watched a different video of the same event
- each viewed a unique items
- pairs in one conditions were encouraged to discuss the event before
in a control group they were 0 %
post even discussion reduces accuracy of ewt