The Temperament and Character Inventory (TCI) [3], [36], [37] is a self administered questionnaire that is based on the psycobiological temperament model of Robert Cloninger. The 240 true/false question version was used. The factorial structure, internal validity and test-retest reliability of the TCI have been previously demonstrated in both general and psychiatric populations [37]–[41]. The Finnish version of the TCI was used [41]. In the present study we concentrated on the dimension of HA due to its relevance to the aims of the study.