Achievement goal theory is one of the most widespread motivation models within education research. Strong empirical support exists for the trichotomous model, comprising mastery-approach, performance-approach, and performance-avoidance goals. However, research also indicates problems with model transferability between contexts. In this study,…

This longitudinal study investigated the contribution of achievement goals and academic self-concept for the prediction of unexpected academic achievement (i.e., achievement that is higher or lower than expected with respect to students' cognitive ability) in general and when comparing groups of extreme over- and underachievers. Our sample…