Developmental Psychology (Apr 4, 2019). DOI:10.1037/dev0000714 Research has documented various family and individual risk factors associated with severe conduct problems, but little is known about the developmental origins of children who engage in both aggressive and prosocial interactions with others. The present study utilized growth-mixture modeling to identify distinct trajectories of physical aggression and prosocial behavior across the preschool years in a large ( n = 424), diverse (42% immigrant) Canadian sample.. To read the full article, log in using your NHS OpenAthens details.