Loftus and Palmer- Procedures

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What was Loftus' research method?
2 controlled laboratory experiments.
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What did her sample consist of?
45 students (Exp 1) and 150 students (Exp 2) selected using opportunity sampling.
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In Exp 1 what groups were the pps divided into?
5 groups of 9 pps
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In exp 1, how many short films were watched of traffic accidents?
7 (5-30 secs)
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In exp 1, what did the questionnaire first ask them?
To "give an account of the accident you have just seen".
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In exp 1, what was the critical question they were asked, buried in specific questions, about the speed of the cars in the film?
"About how fast were the cars going when they... each other?"
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What were the 5 words that changed in the critical question in exp 1?
Smashed, collided, bumped, hit and contacted.
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How long did Exp 1 last for?
1 hour 30 mins
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In exp 2, how many groups were there?
3 groups of 50 pps.
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In exp 2, How long did the video clip last for and what was it of?
1 minute film of a multiple crash (with no broken glass) following a similar procedure to exp 1.
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What was the difference in the 3 groups in exp 2?
1 group was asked the question with 'hit', another with 'smashed' and the control group was not asked about the speed in the initial questionnaire.
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What were all the pps asked to do a week later, in exp 2?
To fill in a further 10 questions that included "Did you see any broken glass?"
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In both experiments where was the critical/leading question?
It was buried in the questionnaires and randomised in position.
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How did Loftus address some ethical issues?
Films of accidents only lasted a few seconds (eg. in exp 2 the crash lasted 4 seconds) to reduce potential harm.
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Other cards in this set

Card 2

Front

What did her sample consist of?

Back

45 students (Exp 1) and 150 students (Exp 2) selected using opportunity sampling.

Card 3

Front

In Exp 1 what groups were the pps divided into?

Back

Preview of the front of card 3

Card 4

Front

In exp 1, how many short films were watched of traffic accidents?

Back

Preview of the front of card 4

Card 5

Front

In exp 1, what did the questionnaire first ask them?

Back

Preview of the front of card 5
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