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Updated: May 30, 2026

Human Circadian Phenotyping and Diurnal Performance Testing in the Real World
Published on: April 7, 2020
Circadian phase preference in college students: relationships with psychological functioning and academics
Daniel J Taylor1, Kendra C Clay, Adam D Bramoweth
1Department of Psychology, University of North Texas, P.O. Box 311280, Denton, TX 76203-1280, USA. djtaylor@unt.edu
Abstract:
The current study offers a comprehensive assessment of psychosocial functioning and academic performance in relation to circadian phase preference in a US sample of undergraduate college students (N = 838), aged 17-26 (M = 19.78, SD = 1.89). Women had greater morning preference than men, and seniors had greater morning preference than freshmen. Circadian phase preference, fatigue, perceived stress, depression, anxiety, and substance use were assessed cross-sectionally and grade point average (GPA) was assessed prospectively. Evening phase preference was related to higher levels of fatigue, alcohol and caffeine use, and worse academic performance than morning or intermediate phase preferences.
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