Experiment One Method: Participants were shown a film of a multiple car crash. Then they were asked a series of questions including 'How fast do you think the cars were going when they hit?' In different conditions, the word 'hit' was replaced with, 'smashed', 'collided', 'bumped' or 'contacted'.
Results: Participants given the word 'smashed' estimated the highest speed (an average of 41 mph), and those given the word 'contacted' gave the lowest estimate (an average of 32 mph).
Experiment Two Method: Participants split into three groups. One group was given the verb 'smashed', another 'hit', and the third, control group wasn't given any indication of the vehicles' speed. A week later, the participants were asked 'Did you see any broken glass?'.
Results: Although there was no broken glass, participants were more likely to say they'd seen broken glass in the 'smashed' condition than any other.
Conclusion: Leading questions can affect the accuracy of people's memories of an event.
Evaluation:
Has implications for police interviews.
Artificial experiment- watching a video not as emotionally arousing as witnessing an event.
The leading questions may have skewed participants' expectations, leading to demand characteristics. This would reduce the validity and reliability of the experiment.
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