Despite several decades of research on self-efficacy, no direct research has been done on a potential correlation between reduced sense of individual self-efficacy and aggression. The goal of this study was to establish such a correlation in an experimental setting by artificially manipulating participant’s self-efficacy on a cognitive task. Subsequently, participant aggression was measured using the Novaco Anger Inventory (1975). 18 college undergraduates participated in this study, and no significant correlation was found. However, due to procedural difficulties and the presence of significant confounding variables, further trials are suggested.