Loftus and Palmer - accuracy of memory with leading questions
- See if estimates were influenced by verbs
- Do leading questions bias a persons response or alter memory?
Context - Leading Questions
When Eyewitnesses give evidence in court, they must take an oath.
However, they could be misleaded by leading questions.
When asked questions by officials, leading questions suggest what answer is desired
eg - The car was red, wasnt it?
Context - Previous Research
- Car travelling at 12mph
- Ranged from 10-50mph
-Phrasing of the question
-smashed and hit
-different consequences to the impacts to what they are referring
-hit being 'gentler' then smashed
Procedures- Experiment 1
Experiment 1 - Independent measures design.
- 45 American Students
-Seven films shown ranging from 5 - 30 seconds
-Recieved a questionnaire
-Divided into 5 groups of 9 participants
5 Critical questions changing the verb (IV)
- Hit, Smashed, Collided, Bumped and Contacted
Procedures- Experiment 2
Experiment 2 - Independent measures design
- 150 different students
- 50 participants were asked how fast the car was going when they smashed into each other
- 50 participants were asked how fast the car was going when they hit into each other?
- 50 participants were in a control group and were not asked any question.
- 1 week later, participants returned and answered various questions
- Critical question - was there any broken glass?
There was no broken glass