factors affecting accuracy of ewt - misleading information ao1 Flashcards
what can affect the accuracy of ewt
anxiety
misleading information
accuracy of ewt can be imporved by
cognitive interview
ewt definitiona
account give by someone of a crime usually
misleading info def
incorrect info given to ewt usually after the event which distorts what they remember
2 types of misleading info
leading questions
post event discussion
what is a leading question
questions phrased in a way that they lead us or imply us to a specific answer
who and when did research into leading questions
loftus and palmer 1963
loftus and palmer 1963 - what did they make ppts doo
45 ppts to watch film clips of car accidnet
then asked ppts a critical question how fast were the cars going when they ______ eachother?
what did loftus and palmer ask ppts
then asked ppts a critical question how fast were the cars going when they ______ eachother
5 verbs used in critical questions
bumped
knocked
hit
contacted
smashed
mean estimate speed for groups who heard word contacted was
38.8 mph
mean estimate speed for groups who heard word smashed was
40.5mph
what do findings of loftus and palmer suggest
leading question biased the ew recall of event
2 reasons why leading questions affect ewt
response bias
substitution bias
what is response bias
wording of question doesnt affect ppts memory just affects what we say when we answer
what is substitution bias
wording of question changes ppts memory of event
substitution bias lead to..
loftus palmer second expiremenr 1974
what happened in loftus and palmers second expiriment
ppl who heard the critical verb smashed more likely to report broken glass although there wasnt any then ppts who heard the word hit
what is post event discusiion
more than 1 witness
they discuess what theyve seen with eachother or with other ppl
could influence accuacy of recall of event
who studied post event discussion
gabbert et al 2003
procedure of gabbert et al 2003
ppts paired up
each ppt watched video of same crime at different angles
and so saw differernt things eg one of pptsv able to see title of a book carried by a woman
then ppts pairednback and allowed to discuss what they saw
there was also a control grouo where there was no post event discussion
findings from gabbert et al 2003
71 % of ppts mistakenly recalled info they couldnt of seen but picked up on during post event discussion
vs in the control grouo where 0% of ppts picked up on things they couldnt have seen
2 explanations fot effects of ped
memory contamination
memory conformity
what is memory contamination
during ped memory gets distorted through combining memory of others with your own
what is memory conformity
witnesses go along with eachother to win social approval or because they think others are right