Group Effects on Decision-Making by Burglars

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Abstract
30 active burglars were observed and interviewed extensively over a period of 16 months. They were asked to evaluate sites they had previously burglarized and those burglarized by others, as to their perceived vulnerability to burglary. Burglars who evaluated sites singly rated the sites more vulnerable than those same burglars when evaluating the sites in the presence of their usual co-offenders—showing a trend toward more cautious decision-making while in groups—a group polarization effect. On the other hand, self-reports indicated that burglars were more active (committed more crimes) when working as part of a group than when working alone. Their self-reported apprehension rate was 5 times greater when working in groups than when working alone, a finding which may reflect task impairment as a result of social facilitation effects.

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