Answer to Question 1
The general aggression model is a newer framework and, when compared to the frustration-aggression theory, provides an even more complete account of the foundations of human aggression. According to the GAM, aggression is triggered by a wide range of input variables that influence one's arousal, affective states, and cognitions.
Answer to Question 2
Aggression is thought to increase as temperature increases. However, an exception seems to be that when temperature gets too high, people become lethargic from the heat and aggression drops. In a study, property crimes (not thought of as crimes of aggression) were not affected by heat, but violent crime went up with heat. In another study, at midday, violent crime went up as temperatures increased, but then dropped off as they became too high. On the other hand, in the evening hours, violent crime went up in a linear fashion and didn't drop off because heat in the evening didn't get to midday levels (so people never became lethargic).
