MORNING AND EVENING TYPES - STRESS-RELATED PERSONALITY ASPECTS

A group of 232 adult subjects was administered the Morningness-Evening ness Questionnaire to assess their individual circadian typology and a battery of questionnaires of personality and psychological and psycho somatic disorders (Beck Depression Inventory; Bortner Type A Scale; Ey senck Personality Questionnaire; Jenkins Activity Survey; Middlesex Ho spital Questionnaire; Strelau Temperament Inventory). Significant corr elations between circadian typology scores and data relative to person ality, psychosomatic disorders, and stress-prone behaviour were found. Evening types reported psychological and psychosomatic disturbances m ore frequently and intensively than morning types, and showed more pro blems in coping with environmental and social demands. The relevance o f the morningness-eveningness dimension for research on stress and car diovascular diseases is discussed. (C) 1998 Elsevier Science Ltd. All rights reserved.