@ARTICLE{10.3389/fpsyg.2019.00114, AUTHOR={Ciarrochi, Joseph and Sahdra, Baljinder K. and Hawley, Patricia H. and Devine, Emma K.}, TITLE={The Upsides and Downsides of the Dark Side: A Longitudinal Study Into the Role of Prosocial and Antisocial Strategies in Close Friendship Formation}, JOURNAL={Frontiers in Psychology}, VOLUME={10}, YEAR={2019}, URL={https://www.frontiersin.org/articles/10.3389/fpsyg.2019.00114}, DOI={10.3389/fpsyg.2019.00114}, ISSN={1664-1078}, ABSTRACT={Resource control theory (RCT) posits that both antisocial and prosocial behaviors combine in unique ways to control resources such as friendships. We assessed students (N = 2,803; 49.7% male) yearly from junior (grades 8–10) to senior high school (11–12) on antisocial (A) and prosocial (P) behavior, peer nominated friendship, and well-being. Non-parametric cluster analyses of the joint trajectories of A and P identified four stable profiles: non-strategic (moderately low A and P), bi-strategic (moderately high on A and P), prosocial (moderately low A and moderately high on P), and antisocial (moderately low on P, and very high on A). There were clear benefits to youth using bi-strategic strategies in junior high: they attracted relatively high levels of opposite sex friendship nominations. However, this benefit disappeared in senior high. There were also clear costs: bi-strategic youth experienced relatively low well-being, and this effect was significantly more pronounced for females than males. Prosocial youth were the only ones who maintained both high friendship numbers and high well-being throughout high school. We discuss the cost/benefit trade-offs of different resource control strategies.} }