Korean J Biol Psychiatry.  2014 Aug;21(3):93-98.

Relationships between Chronotypes and Temperament and Character Dimensions in Healthy Young Adults

• Park CI
• Kang JI
• Namkoong K
• Kim SJ

Abstract

OBJECTIVES
Circadian rhythms have been known to have associations with psychiatric disorders and personality traits. The present study investigated the relationships between circadian typology and temperaments/characters in a non-clinical Korean population.
METHODS
Two hundred six healthy Korean college students (male 109, female 97) participated in this study. The subjects completed the Composite Scale of Morningness for circadian typology and 140-item Temperament and Character Inventory-Revised-Short version (TCI-RS).
RESULTS
Multivariate analyses of covariance showed a significant association between chronotypes and temperamental dimensions of the TCI-RS. Morning types were significantly associated with lower harm avoidance and higher persistence and self-directedness dimensions, compared to evening types and intermediate types. No interaction effects between sex and chronotypes were shown for temperamental dimensions.
CONCLUSIONS
The present findings suggest that high persistence and self-directedness characters are related to morning types and high harm avoidance temperament is more related to evening types.

Keyword

Circadian rhythms; Chronotype; Temperaments; Harm avoidance; Temperament and Character Inventory