The study of aggression plays a prominent role in psychology and public health, because of the important adverse consequences of such behavior for victims, aggressors, and society in general. The General Aggression Model (GAM) provides a general conceptual framework for understanding the aggressive as a result of three stages: (a) inputs: personal and situational factors; (b) present internal states: affect, cognition, and arousal; and (c) outcomes: decision processes with a (non)aggressive result. The main objective of this research was to study the personal protective and risk factors most strongly associated with aggressive behavior acting at the first stage of the GAM model. A total of 282 young adult participants took part in this study. Participants were assessed for aggression levels and a set of the most relevant variables that have been associated with aggressive behavior in the previous literature. Stepwise multiple regression analysis revealed that levels of aggression were mainly associated (73.2% of the explained variance) with the following protective factors: the ability to manage emotions as a component of emotional intelligence (EI), and perspective-taking and personal distress as components of empathy, and with the following risk factors: negative and positive urgency as a component of impulsivity, fantasy as a component of empathy, negative affect, and expressive suppression of emotions. These findings provide a better understanding of the mechanisms underlying aggressive behavior and provide greater empirical value to the current theoretical models. In addition, this research can help to inform the design of more successful programs for the prevention, control, and treatment of aggressive behavior. Limitations and future lines of research are discussed.
Keywords: aggression; emotional intelligence; empathy; impulsivity; negative affect; protective factors; risk factors.