How Sleep Timing Preferences Affect School Adjustment, Sleep, and Health in Teenagers Over a School Year

Participants (N = 6522) aged 12-16 reported associations between chronotype and various health and school adjustment issues.

• Evening-type adolescents showed higher rates of sleep problems and depressive mood compared to Morning-types.
• Difficulties in school adjustment were more prevalent among Evening-types, including symptoms like school burnout and daytime tiredness.
• Definite Evening-types exhibited the poorest concentration in lessons and the greatest tendency to give up on challenging tasks.
• Extreme chronotypes were linked to feelings of loneliness and lower peer acceptance, with Morning-types experiencing a notable decline in peer acceptance over the school year.
• Digital media use was associated with physical health complaints such as neck pain, lower back pain, and headaches among adolescents.

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