The Karolinska Scales of Personality detachment scores were significantly related to striatal [11C]raclopride binding (r=–0.50, df=16, p=0.03) (F1). After T-score transformation to adjust for sex effects, the relationship remained significant (r=–0.49, df=16, p=0.04). However, the Tridimensional Personality Questionnaire attachment scores were not significantly related to striatal specific binding (r=0.23, df=16, p=0.34), and T-score-transformed data also were not significantly related to specific binding (r=0.25, df=16, p=0.27). The Karolinska Scales of Personality detachment scores and Tridimensional Personality Questionnaire attachment scores were significantly related to each other (r=–0.50, df=16, p=0.04). There were no significant relationships between specific binding and the other Karolinska Scales of Personality cluster scores (r=0.27 to –0.39, p>0.10), including the irritability cluster (r=–0.005, df=16, p=0.98). The Tridimensional Personality Questionnaire sentimentality score, which comprises five items, was significantly related to binding (r=–0.71, df=16, p=0.001). In addition, it was positively correlated with the Karolinska Scales of Personality detachment score (r=0.47, df=16, p=0.05). The other Tridimensional Personality Questionnaire cluster scores were not related to binding (r=0.31 to r=–0.29, p>0.20).