Loftus and Palmer's Procedures

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WHat was L+P's research method?
two controlled laboratory experiments
1 of 10
What did L+P's sampling consist of?
45 students in exp1 and 150 iin exp 2 via opportunity sampling
2 of 10
How many groups were there in exp 1 and how long and how many videoes were there?
5 groups of 9 and they watched 7 short films (5-30 seconds) of traffic accidents
3 of 10
What did the questionnaire in exp 1 ask them?
"give an account of the traffic accident you have just seen"
4 of 10
What specific questions did the questionnaire ask in exp 1?
these were the citical questions "about how fast were the cars going when they hit each other?" replacing the word hit with smashed, collided, bumped and contacted for the other 4 groups
5 of 10
In exp 2, how many groups were there and how long was the video?
3 groups of 50 pps and it was a 1 minute video of a multiple crash (with no broken glass)
6 of 10
What did they then ask the pps in exp 2?
How fast were the cars going when they smashed into each other and another 50 the same question but with hit instead of smashed (not asking the control group about speed in the initial questionnaire)
7 of 10
What were they asked to do a week later in exp 2?
Asked to fill in a further 10 questions including the critical question "did you see any glass"
8 of 10
What did they do with the critical questions in both questionnaires?
Buried amongst other questions in a randomised position
9 of 10
How did L+P address some ethical issues?
Films of accidents only lasted a few seconds (e.g the crash in exp 2 only lasted 4 seconds) to reduce potential harm
10 of 10

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Card 2

Front

What did L+P's sampling consist of?

Back

45 students in exp1 and 150 iin exp 2 via opportunity sampling

Card 3

Front

How many groups were there in exp 1 and how long and how many videoes were there?

Back

Preview of the front of card 3

Card 4

Front

What did the questionnaire in exp 1 ask them?

Back

Preview of the front of card 4

Card 5

Front

What specific questions did the questionnaire ask in exp 1?

Back

Preview of the front of card 5
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