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Loftus and Palmer (1974)


To investigate the effect of leading questions on the accuracy of eyewitness testimony. Will the use
of more severe sounding verbs to describe an accident lead participants to:

Produce a higher estimate of speed?
Be more likely to (incorrectly) recall the presence of broken glass?…

Page 2

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The more severe sounding the verb was, the higher the speed estimate was

Verb used in critical question Average speed (mph)

Smashed 40.8

Collided 39.3

Bumped 38.1

Hit 34.0

Contacted 31.8

Data Gathered

Quantitve data was collect
This was the speed of the cars


The verb distorts…

Page 3

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Group 3 ­ Control so they were not asked to estimate speed

One week later

All subjects were questioned again
Critical question, `Did you see any broken glass?'
There was no broken glass in the film.

Independent Variable

The word in the question

Dependent Variable

How many people said that…


sara majic


brilliant summary of study, thanks!

Ibrahim - Team GR


Great set of condensed notes!Really helped with revision!ThankYou!!

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