loftus and palmer 1974 Flashcards
how many experiments were in the study
2
what was the aim of experiment one?
investigate the variables that may effect estimates of speed in eyewitness testimony
investigate whether leading questions would affect speed estimates
where did the study take place?
university of washington
how many participants took part in one?
45 undergraduate students
how many films were shown in 1?
seven each containing a car accident
where were the films taken from 1?
evergreen safety council and seattle police
who long were the films?1
5 to 30 seonds
once they had watched a film what was given to them 1?
a questionnaire
give account of the accident and then specific questions
critical question
what was the critical question in 1?
how fast were the cars going when they hit each other
what verbs were used in 1?
hit smashed collided bumped or contacted
how long did the experiment last for?
one hour and a half
what was the mean speed for contacted 1?
31.8
what was the mean score for smashed 1?
40.5
what was the aim of experiment 2?
to provide additional insights into experiment one
did change of verb actually change memory or just indication of the speed
how many participants in 2>
150 students
how long did the film in 2 last for?
1 minute actual accident only lasted 4 seconds
how many participants were asked how fast car going when hit and smashed and not asked at all
50
50
50
how long was it until participants returned 2?
one week
what were participants asked when they returned in 2?
a series of questions including the critical question
did you see any broken glass (embedded amongst nine other questions)
even though there was none
how many people in the smashed condition said they saw broken glass?
16
how many in hit condition said they saw broken glass?
7
how many in condition with no question saw broken glass?
6
