Horne & Östberg morningness-eveningness questionnaire: A reduced scale

This study presents a reduced scale of Horne & Östberg's Morningness-Eveningness questionnaire. The information collected from the questionnaire (adapted a nd standardized for the Spanish population), which was administered to a sample of subjects (N=908) with different work schedules and ages, was analysed according to multiple correspondences and cluster. The total scores and the 5 types considered in the Horne & Östberg questionnaire and the reduced from correlate very closely. The special interest of the reduced questionnaire is twofold. On the one hand, there is its actual make-up: it only contains questions about Morningness, which helps to define this dimension better. On the other hand, it shows how information can be collected more easily for research, especially in the case of using broad samples of subjects. The results obtained from the reduced scale for the variables contemplated in our researches corroborate the primacy of work schedule and age. Extraversion correlates negatively with Morningness scores, while sex and neuroticism show no significant differences.