Validity of the Morningness‐Eveningness Scale for Children among Spanish Adolescents

A sample of 623 urban high school students completed the Spanish version of the Morningness-Eveningness Scale for Children (MESC).

• Adolescents typically exhibit later sleep patterns compared to other age groups.
• The later sleep patterns are influenced by both biological and psychosocial factors.
• The Spanish version of the MESC shows good validity when compared to various psychological measures.
• Significant differences in self-reported sleep behaviors and alertness were observed between morning and evening types based on time-of-day.
• These findings offer preliminary support for the MESC's effectiveness in identifying sleep chronotypes in adolescents.

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