Background. Chronotype influences both sleep characteristics and behavior. Evening oriented children are more at risk to develop behavioral problems compared to morning oriented children....Show moreBackground. Chronotype influences both sleep characteristics and behavior. Evening oriented children are more at risk to develop behavioral problems compared to morning oriented children. Insufficient sleep is common during childhood and can lead to behavioral problems. However, the association of sleep duration, chronotype and behavioral problems remains unclear, especially in children. Therefore, the current study examined the degree to which sleep duration acts as a mediator of the influence of chronotype on behavioral problems in Dutch non-clinical 9-11 year old children. Method. The sample consisted 483 children, 219 boys and 264 girls, with a mean age of 10.49 year old. Sleep duration was assessed with sleep diaries. Chronotype was measured using Children´s Chronotype Questionnaire (CCTQ) and behavioral problems were assessed with Strengths and Difficulties Questionnaire (SDQ). Results. Regression analyses showed chronotype was a significant predictor of sleep duration (= -.10, p = .035), externalizing ( = .10, p = .030), but not internalizing behavioral problems (= .04, p = .410). Sleep duration was not significantly related to internalizing and externalizing behavioral problems. Furthermore, sleep duration did not act as a mediator between chronotype and internalizing (= .01, p = .900) or externalizing behavioral problems (= -.01, p = .869). Conclusions. Evening orientated children are more at risk to develop externalizing behavioral problems, which may lead to psychopathology and poor school performances. Short sleep is associated with eveningness and increased externalizing behavioral problems. Yet, sleep duration did not mediate the influence of chronotype on behavioral problems. Eveningness is identified as a possible risk factor. Early intervention to shift chronotype orientation to morningness or the use of flexible school times adjusted to optimal sleep-wake patterns might prevent problems later in life. More research is needed to provide understanding how the relation between sleep duration, chronotype and behavioral problems develops.Show less
Research master thesis | Developmental Psychopathology in Education and Child Studies (research) (MSc)
open access
2015-01-01T00:00:00Z
This study explored the relation between chronotype and cognitive and behavioral problems in 333 school-aged children (mean age 9.97 years, 55% girls), with an important focus on a potential...Show moreThis study explored the relation between chronotype and cognitive and behavioral problems in 333 school-aged children (mean age 9.97 years, 55% girls), with an important focus on a potential mediating role of sleep duration and sleep quality. Participants completed short-form WISC-IIINL and several tasks on the Amsterdam Neuropsychological Tasks (ANT), which assesses important domains of attention. Their parents filled out a sleep log and several questionnaires regarding chronotype (CCTQ), sleep habits (CSHQ), and behavioral problems (CBCL). Results showed that indeed eveningness was associated with behavioral problems. No direct associations with cognitive functioning were found. Sleep duration was not associated with cognitive-behavioral functioning. Sleep quality, specifically feeling rested in the morning during weekdays, was associated with cognitive and behavioral functioning. Several mediating relations were identified. The findings highlight that sleep quality partially mediates the relation between chronotype and cognitive-behavioral problems. Evening types show behavioral problems when they do not feel rested in the morning. These findings have significant clinical implications.Show less
