Original:  Payne et al. found that individuals with high levels of trait and state LGO and low levels of trait APGO had better job performance, that PPGO was unrelated to performance, and that LGO predicted job performance above and beyond both cognitive ability and the Big Five personality characteristics.
Revised:  Payne et al. found that individuals with high levels of trait and state LGO and low levels of trait APGO had better job performance, PPGO was unrelated to performance, and that LGO predicted job performance above and beyond both cognitive ability and the Big Five personality characteristics.
Edit intent: clarity