... perhaps because they were stressed and did not want to add to that by causing conflict with other participants. Baron and Ransberger collected data on incidents of group violence in USA and corresponding weather reports to extend the inverted 'U' hypothesis. They found that around 48 degrees Celsius, violence was at its highest. Any hotter and it declined. In explanation of the link between heat and aggression, Moghaddam suggests that temperature increases are unlikely to cause increases in aggression, instead it is more likely to be social contact. The statistics gathered from the American homicide statistics support this as it shows there are peaks in homicide rates for late summer and December. The temperatures can change the way in which people interpret ambiguous situations and influence a person towards an aggressive response. It could be due to the increased frequency of contact between people as more time is spent outside. ...

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