Consistent with prior research, IQ was most strongly related to openness to experience. Out of 9 dimensions of openness to experience, 8 out of 9 were positively related to IQ: intellectual engagement, intellectual creativity, mental quickness, intellectual competence, introspection, ingenuity, intellectual depth, and imagination. Interestingly, IQ was much more strongly related to intellectual engagement and mental quickness than imagination, ingenuity, or intellectual depth, and IQ was not related to sensitivity to beauty.
Out of 45 dimensions of personality, 23 dimensions were not related to IQ. This included gregariousness, friendliness, assertiveness, poise, talkativeness, social understanding, warmth, pleasantness, empathy, cooperation, sympathy, conscientiousness, efficiency, dutifulness, purposefulness, cautiousness, rationality, perfectionism, calmness, impulse control, imperturbability, cool-headedness, and tranquility. These qualities were not directly relevant to IQ.
8 dimensions of personality outside the openness to experience domain were positively related to IQ, including organization, toughness, provocativeness, leadership, self-disclosure, emotional stability, moderation, and happiness — although the correlations were much smaller than with intellectual engagement and mental quickness. IQ was negatively related to orderliness, morality, nurturance, tenderness, and sociability, but again, the negative correlations were much smaller than the relationships among IQ, intellectual engagement, and mental quickness.