ADAPTATION AND STANDARDIZATION OF A SPANISH VERSION OF THE MORNINGNESS EVENINGNESS QUESTIONNAIRE - INDIVIDUAL-DIFFERENCES

This study is an adaptation and standardization of Horne and Östberg's questionnaire for the Spanish population. The variables age (17-50) and work hours were studied in subjects from the student community and in workers with different work schedules (morning, afternoon, morning-afternoon and night). At the same time, information was collected from the EPQ questionnaire in order to correlate preferences and the personality dimensions extraversion and neuroticism, and determine the relationship between them. Use of the Morningness-Eveningness Questionnaire (MEQ) produces differential results in the study of individual differences and rhythmicity, and it is a variable which should be considered in studies in this field. Hence the interest in the possible use of the questionnaire in Spanish as a tool for future research. For this purpose we have selected a broad sample of individuals which enables us to generalize about the results, and we have given consideration to sex, age, work schedule and personality traits in the MEQ scores, and their relative priority. The results corroborate the discoveries of previous researchers who studied these parameters separately, and confirm the importance of work schedule and age over personality of the subjects. © 1990.