"Self-handicapping is a performance-debilitating characteristic, which in student populations has been consistently associated with negative outcomes such as academic underachievement and poor psychological adjustment. Perfectionism, locus of control, and self-efficacy have been linked with self-handicapping but have not been previously examined within one cohesive framework. This study, therefore, examined a model linking maladaptive perfectionism and external locus of control to self-handicapping, both directly and indirectly through their mediated effect on self-efficacy. Participants were 79 university students who completed an online survey comprising measures of perfectionism, locus of control, general self-efficacy, and self-handicapping. It was found that perfectionism and locus of control predicted self-handicapping; and perfectionism, but not external locus of control, predicted low self-efficacy. The mediation analyses found no support for self-efficacy as a mediator of the relationship between perfectionism, locus of control, and self-handicapping. These findings suggest that the interaction of maladaptive social cognitive constructs associated with self-handicapping requires further investigation.""

Locus of control is something that you earn. You can't artificially manipulate because its not a physical variable - just a concept in your head.