Abstract
The aim of the present study was to test whether morningness–eveningness is related to the six dimensions of temperament postulated in the Regulative Theory of Temperament: briskness (BR), perseveration (PE), sensory sensitivity (SS), emotional reactivity (ER), endurance (EN), and activity (AC). A sample of 581 undergraduates (age: 21.92±2.54; 381 female) completed the Morningness–Eveningness Questionnaire (MEQ) and the Formal Characteristics of Behaviour – Temperament Inventory. Data was analysed using linear and quadratic hierarchical regressions. The MEQ scores exhibited linear associations with BR and EN and quadratic relationships with PE, ER and AC. Morningness was related to high levels of EN, BR and AC and low levels of PE and ER, while eveningness was associated with low levels of EN, ER, BR and PE and high levels of AC. Subjects in the middle of the morningness–eveningness dimension exhibited high levels of PE and ER, low levels of AC, and average levels of EN and BR. Morningness was related to the most advantageous temperament profile, and temperament is discussed as a possible mediator between morningness–eveningness and mood and affective disorders.
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