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Associations between Cloninger's temperament and character traits and light preference
Hirofumi Hirakawa1, Takeshi Terao1, Kentaro Kohno1
1Department of Neuropsychiatry, Faculty of Medicine, Oita University, Yufu, Oita, Japan.
Frontiers in Psychiatry
|October 8, 2025
Summary
Self-directedness, a Cloninger character trait, is linked to a preference for bright light and avoiding phone use before bed. This study explored personality traits and light preferences in healthy adults.
Area of Science:
- Psychology
- Behavioral Science
Background:
- Investigating the relationship between light preference and Cloninger's temperament and character traits.
- Examining associations in healthy individuals.
Purpose of the Study:
- To test hypotheses linking self-transcendence to brightness preference and harm avoidance to darkness preference.
- To explore the connection between Cloninger's traits and light preferences.
Main Methods:
- Analyzed data from 130 healthy participants using Shapiro-Wilk test and non-parametric tests.
- Employed binomial logistic regression to assess temperament and character scores against light preference, morning light exposure, and bedtime mobile phone use.
Main Results:
- Found a significant association between self-directedness and brightness preference.
- Discovered a link between self-directedness and not using mobile phones before bed.
- Hypotheses regarding self-transcendence and harm avoidance were not supported.
Conclusions:
- Self-directedness may correlate with brightness preference and reduced bedtime mobile phone usage.
- Further research is needed to establish causal links between personality traits and light preferences.
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