Japanese Journal of Social Psychology
Online ISSN : 2189-1338
Print ISSN : 0916-1503
ISSN-L : 0916-1503
A comparison of perceived risk of crime between lay public and expert : Estimation of crime numbers by undergraduate students and police officers
Kazuya NAKAYACHITakahito SHIMADA
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2008 Volume 24 Issue 1 Pages 34-44

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Abstract
The purpose of the present study was to compare the perceived risk of crimes between the lay public and experts. A hypothesis of the lay public's risk perception was deduced using the weight function of prospect theory. It was expected that the lay public would overestimate the number of personal injury crimes, which are statistically low, and underestimate the number of property crimes, which are statistically higher. Experts, on the other hand, were expected to correctly estimate the number of crimes in each category. One hundred and sixty undergraduate students and 259 police officers estimated an average annual number for each of 18 crimes. The results supported the hypothesis, revealing that the public overestimated the number of personal injury crimes, which rarely occur, and underestimated the number of property crimes, which occur frequently. Implications of these results for experts and how they communicate with the lay public regarding crime prevention were discussed.
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© 2008 The Japanese Society of Social Psychology
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