Supernumerary personality traits beyond the Big Five: Predicting materialism and unethical behavior

► We tested the incremental validity of supernumerary traits beyond the Big Five. ► Criteria were materialism and unethical decision-making. ► Beyond Agreeableness, Seductiveness and low Thriftiness predicted materialism. ► Low Integrity incrementally predicted unethical decision-making. ► Results indicate a need to look beyond the Big Five in theory and prediction.