Weather Effects on Mobile Social Interactions Figure 1. Probability mass of talk time and degree. doi:10.1371/journal.pone.0045745.g001 strong relationship between weather (hours of sunshine) and stock prices. He offered that particular investors’ misattribution of good mood on sunny days led to biased decision-making processes that in turn influenced the overall stock prices. Cohn’s extensive literature review [13] noted a correlation between assaults, burglary, collective violence, domestic violence, and rape to changes in temperature. Such violent behaviors and crime tend to increase with ambient temperature, at least up to about 85uF. However, the relationship between heat and homicide is uncertain. In general, it appears that most violent crimes against persons increase linearly with heat, while property crimes are not strongly related to temperature changes. The mediating factors Figure 2. Locations of the weather stations in Lisbon, Portugal. doi:10.1371/journal.pone.0045745.g002 PLOS ONE | www.plosone.org 2 October 2012 | Volume 7 | Issue 10 | e45745