This longitudinal research examined a structural model of the self-regulato
ry mechanisms governing transgressive conduct. Perceived academic and self-
regulatory efficacy concurrently and longitudinally deterred transgressiven
ess both directly and by fostering prosocialness and adherence to moral sel
f-sanctions for harmful conduct. The impact of perceived social self-effica
cy was mediated through prosocialness. Moral disengagement and prosocialnes
s affected transgressiveness through the mediating influence of irascible a
ffectivity and hostile rumination. Ruminative affectivity, in turn, both co
ncurrently and longitudinally affected transgressiveness. Moral disengageme
nt also contributed independently to variance in transgressiveness over tim
e. This pattern of relations was obtained after controlling for prior trans
gressiveness. The structural model was replicated across gender and provide
d a better fit to the data than did several alternative models.