The Effects of Cognitive Ability and Conscientiousness on Performance Over Time: A Censored Latent Growth Model

This study examined the extent to which cognitive ability and conscientiousness predicted initial academic performance (i.e., grade point average) and changes in performance over the course of college students' careers. A censored latent growth model that controlled for initial performance was used. Results showed positive effects of cognitive ability and conscientiousness on initial performance, but only positive effects of conscientiousness on performance change. However, because initial performance negatively affected performance change, cognitive ability and conscientiousness negatively indirectly affected performance change through initial performance. In addition, results revealed cognitive ability accounted for more variance in initial performance than conscientiousness, and conscientiousness accounted for more variance in performance change than cognitive ability. Finally, results show that, beyond the third semester, conscientiousness is a better predictor of student performance than cognitive ability.

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