RT Journal Article
T1 Chronotype and time-of-day effects on mood during school day
A1 Díaz Morales, Juan Francisco
A1 Escribano Barreno, Cristina
A1 Jankowski, Konrad S
AB 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.
PB Informa Healthcare USA, Inc. New York
SN 0742-0528
YR 2015
FD 2015-07
LK https://hdl.handle.net/20.500.14352/24106
UL https://hdl.handle.net/20.500.14352/24106
LA eng
NO Ministerio Economía y Competitividad (MINECO)
NO Ministerio Ciencia e Innovación (MICINN)
NO National Science Centre (Polonia)
DS Docta Complutense
RD 19 abr 2025