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Morningness-eveningness preference and mood in Japanese junior high school students
Hitomi Takeuchi1, Hiromi Morisane, Akira Iwanaga
1Laboratory of Environmental Physiology, Faculty of Education, Kochi University, Kochi, Japan. rhythmsyn@hotmail.com
Psychiatry and Clinical Neurosciences
|June 6, 2002
Abstract:
The relationship between morningness-eveningness (M-E) preference and mood in Japanese students aged 12-15 years (690 boys and 649 girls) was investigated. No significant difference in M-E preference was seen between genders. Girls became gloomy more frequently than boys, whereby the girls who experienced melancholy more frequently tended to prefer evening. The correlation between mood and M-E preference, which was demonstrated only by girls, might be linked to a rapid shift to evening preference by girls in the past couple of years.