Background & Aims : Individual differences in diurnal preferences and circadian rhythms are viewed as an interesting dimension of human personality. This study aimed to determine the different happiness and satisfaction with life in morning-evening types.

  Materials & Methods : The population of the study included 200 students (176 female and 24 male) who were selected by stratified random sampling method from Talesh Payam Nour University. Morning - Evening Questionnaire (MEQ), Short Form of Satisfaction of life (Q-LES-QSF) and Happiness Scale were completed by students. Data were analyzed using multivariable analysis of variance (MANOVA) and LSD post hoc test.

  Results : The findings indicated that there were significant differences between diurnal types in satisfaction in life and happiness . Individuals with morning types compared to evening types had a high level of satisfaction in life . The results showed low levels of happiness in the evening type.

  Conclusion : The results of this study indicate differences in satisfaction in life and happiness on the basis of circadian rhythms.

  SOURCE: URMIA MED J 2014: 25(1): 20 ISSN: 1027-3727