Is perfectionism associated with fatigue?

Perfectionism has been implicated as a vulnerability factor in the development of chronic unexplained fatigue. In the present study, different components of fatigue and perfectionism were studied in 121 female nurses. They completed a postal questionnaire assessing current (state) and usual (trait) fatigue, and dimensions of personality including six components of perfectionism.

Altruism and aggression: the heritability of individual differences.

Five questionnaires measuring altruistic and aggressive tendencies were completed by 573 adult twin pairs of both sexes from the University of London Institute of Psychiatry Volunteer Twin Register. The questionnaires measured altruism, empathy, nurturance, aggressiveness, and assertiveness. The intraclass correlations for the five scales, respectively, were .