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Slide 1

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Loftus and Palmer (1974)
Experiment into reliability of eye
witness testimony.…read more

Slide 2

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Aim
· To see the effect of leading questions on the
accuracy eye witness testimony.…read more

Slide 3

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Procedure
· Carried out in a lab with 45 participants, which were split
into 5 groups.
· They watched video footage of car accidents, and then
asked to fill out a questionnaire. This contained a critical
question....
· How fast were the cars going when they _____ each other?
· The different conditions had different verbs: hit, collided,
contacted, bumped and smashed.…read more

Slide 4

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Results
· The more severe sounding the verb the
higher estimate of speed.
· Smashed speed estimate- 40.8 compared to
contacted speed estimate- 31.8.…read more

Slide 5

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Conclusion
· The verb used, actually distorted the
memory of the event. There was response
bias. The results they gained were due to
perception not memory. A second
experiment was carried out because of this.…read more

Slide 6

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Aim
· To see the effect of leading questions on
eye witness testimony.…read more

Slide 7

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Slide 8

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Slide 9

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