ABSTRACT
INTRODUCTION Definition and Measurement of Aggression Human aggression can be defined as a) a social behavior that involves the interaction of at least two people; b) is intended to harm another person, who c) finds this harm aversive and would act to avoid it if possible (1). It is well documented that a social context (verbal and nonverbal interaction) is a necessary condition for human aggressive behavior. Furthermore, provocation and retaliation are powerful variables in aggression (2-4), and both require a social context. These variables are central features of the laboratory procedures to be described.
