Personality traits
157
Occurrence of idiosyncratic habits (e.g., biting of lips or nails, twiddling of thumbs, wringing of hands); prevalence of cooperativeness and competitiveness; incidence and distribution of recurrent personality traits (e.g., leadership, submissiveness, aggressiveness); incidence and distribution of recognized types of personality (e.g., introvert, extrovert, obsessional, manic, paranoid, hypochondriac); generalized results of personality tests; indications of cultural selectivity with reference to personality traits and types; evidence bearing upon the existence of a modal or basic personality; etc.