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Chronotype and time-of-day effects on mood during school day

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Díaz Morales, Juan Francisco and Escribano Barreno, Cristina and Jankowski, Konrad S (2015) Chronotype and time-of-day effects on mood during school day. Chronobiology international, 32 (1). pp. 37-42. ISSN 0742-0528

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Official URL: http://doi.org/10.3109/07420528.2014.949736




Abstract

Existing evidence suggests an association between mood, time-of-day and Morningness-Eveningness (M-E). Since few studies have been carried out among adolescents, in this study daily mood fluctuations were analyzed in the naturalistic school context during two days in order to test how chronotype and time-of-day are related to mood during the school schedule period and check if sleep length is involved in the above relation. A sample of 655 adolescents (12-16 years) reported mood levels (current level of pleasantness) three times during school day (8:10-8:30 h, 10:20-11:40 h, 13:50-14:10 h). They also reported M-E preference and time in bed. Neither age nor sex was related to mood. However, the results indicated that regardless of chronotype mood increased throughout the school day from the lowest morning levels. Moreover, morning types showed better mood compared to other chronotypes, while evening types exhibited the lowest mood. Evening oriented students slept less than other chronotypes, but time in bed was not involved in the relationship between chronotype and mood. These results suggest that it is not shortened sleep duration responsible for decreased mood in evening oriented students.


Item Type:Article
Uncontrolled Keywords:Chronotype, Time-of-day, Mood, Affect, Daily, School day, Adolescents
Subjects:Medical sciences > Psychology > Differential psychology
Medical sciences > Psychology > Personality
ID Code:32635
Deposited On:15 Jul 2016 11:50
Last Modified:04 Aug 2016 07:35

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