In vertebrates, aggression has been traditionally associated with high levels of circulating androgens in breeding males. Nevertheless, the centrality of androgens as primary modulators of aggression is being reconsidered in at least in two particular cases: (1) territorial aggression outside the breeding season, and (2) aggression by females. We are developing the weakly electric fish, Gymnotu...

Lactating females express rapid extremes in behavior, ranging from gentle nurturance toward offspring to fiercely protective aggression against intruders. Although males often behave aggressively against intruders, female rodents usually express aggression only when rearing and protecting pups. Nitric oxide (NO) inhibits male aggression; however, its role in maternal aggression is unknown. In t...

BACKGROUND Aggression is a kind of behavior that causes damage or harm to others. The prevalence of aggression is 8-20% in 3-6 years old children. The present study aimed to assess the effect of training kindergarten teachers regarding reinforcement behavior therapy on preschoolers' aggression. METHODS In this cluster randomized control trial, 14 out of 35 kindergarten and preschool centers o...

Title: THE RELATIONSHIP BETWEEN COUPLE PSYCHOLOGICAL AGGRESSION AND PARENTING BEHAVIOR Katelyn Marie Duffy, Master of Science, 2012 Directed By: Professor Norman B. Epstein, Department of Family Science This study examined the relationship between received couple psychological aggression and use of authoritative, authoritarian, and permissive parenting practices. Previous research examining cou...

Two major types of aggression, proactive and reactive, are associated with contrasting expression, eliciting factors, neural pathways, development, and function. The distinction is useful for understanding the nature and evolution of human aggression. Compared with many primates, humans have a high propensity for proactive aggression, a trait shared with chimpanzees but not bonobos. By contrast...

Sex differences in physical and indirect aggression have been found in many societies but, to our knowledge, have not been studied in a population of hunter-gatherers. Among Aka foragers of the Central African Republic we tested whether males physically aggressed more than females, and whether females indirectly aggressed more than males, as has been seen in other societies. We also tested pred...

This study examined whether overt and relational forms of reactive aggression were differentially related to adolescents’ temperament. Measures of adolescents’ temperament and aggression were completed by 670 adolescents (369 females), ages 10–17, and their mothers. Effortful control and fearfulness were inversely associated only with reactive–overt aggression, whereas frustration proneness was...

Five studies tested the hypothesis that gratitude is linked to lower levels of aggression. Although gratitude increases mental well-being, it is unknown whether gratitude mitigates against aggression. Gratitude motivates people to express sensitivity and concern for others and stimulates prosocial behavior. Aggression, defined as intentionally harming another person who is motivated to avoid th...