Despite the innumerable ecological problems and large economic costs associated with biological invasions, the proximate causes of invasion success are often poorly understood. Here, evidence is provided that reduced intraspecific aggression and the concomitant abandonment of territorial behavior unique to introduced populations of the Argentine ant contribute to the elevated population densiti...

The distinction between proactive and reactive functions of aggression is one of the most common divisions when investigating aggression among children and adolescents. To date, self-report is the least used measurement, despite existing literature supporting the view that the best informant regarding internal processes and motives are children themselves. The main aim of this study was to exam...

Around the globe, people fight for their honor, even if it means sacrificing their lives. This is puzzling from an evolutionary perspective, and little is known about the conditions under which honor cultures evolve. We implemented an agent-based model of honor, and our simulations showed that the reliability of institutions and toughness of the environment are crucial conditions for the evolut...

Aggression behaviour in 160 adult Chakma tribal students was studied. The subjects were equally divided into boys and girls. Each category was again subdivided into early adolescent and late adolescent. Age of early adolescent group ranged from 11 to 14 years and late adolescent group ranged from 15 to 18 years. Thus, the study used a 2×2 factorial design representing two levels of gender (boy ...

To date, research focused on "traditional" (i.e. in-person) youth bullying behaviour has documented serious psychosocial challenges for those involved. How this literature translates to youth engaging in aggressive behaviours online has yet to be examined. Using the largest US sample of youth Internet users to date, psychosocial characteristics of youth engaging in Internet harassment were exam...

There is a lack of information based on clinical data to guide clinical judgement in identifying cases where aggressive canine behaviour could be related to pain. This study aimed to identify clinical themes in cases of aggressive behaviour by dogs in which a relevant painful focus was identified versus a control group with similar initial presenting problems, in which no medical complications ...