This report reviews evidence concerned with age-related aspects of social perception processes and their effects on overt behavior. Focus is on the variability among children in comprehension and evaluation of action, motives, and consequences of modeled behavior. Findings indicated that comprehension of acts in terms of motives and correctness of evaluations both increase with age. Behavioral differences appear to be related to these kinds of age differences in comprehension and evaluation. In a study, third graders who watched an aggressive television show with separations (commercials) were more aggressive than third graders who watched without interruptions, but this difference did not hold for older age groups. Finally, possible effects of age-related changes in the bases for evaluating social acts in general (i.e., Piaget's moral development paradigm) are discussed. Preliminary data concerning these questions are presented. All of the research is discussed and interpreted in reference to Bandura's cognitive mediator concept. (DP)