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Gerard A. Kerkhof

Researcher at University of Amsterdam

Publications -  129
Citations -  6242

Gerard A. Kerkhof is an academic researcher from University of Amsterdam. The author has contributed to research in topics: Circadian rhythm & Melatonin. The author has an hindex of 39, co-authored 127 publications receiving 5717 citations. Previous affiliations of Gerard A. Kerkhof include Leiden University.

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Sleep-wake patterns of partners.

TL;DR: Using self-report measures, the sleep/wake patterns and several aspects of marital adjustment of 55 couples were established; however, couples who were mismatched on actual sleep/ wake pattern showed lower marital adjustment than the matched couples.
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Screening for sleep reduction in adolescents through self-report: Development and validation of the sleep reduction screening questionnaire (SRSQ)

TL;DR: Meijer et al. as discussed by the authors validated the SRSQ by calculating correlations with self-reported and objective sleep and selfreported daytime functioning, and found that the questionnaire discriminates well between clinical and non-clinical cases.
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Circadian Phase Estimation of Chronic Insomniacs Relates to their Sleep Characteristics

TL;DR: The conclusion that the addition of oral temperature measurements to a sleep/wake log extends its diagnostic and therapeutic applicability is supported, i.e., that insomniacs with a relatively advanced temperature phase had a relatively shorter and more restless sleep, while insomnianacsWith a relatively delayed temperature phase tended to experience a relatively long sleep latency.
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Are individuals' nighttime sleep characteristics prior to shift-work exposure predictive for parameters of daytime sleep after commencing shift work?

TL;DR: Although no predictors were found for daytime total sleep time, the subjective quality of nighttime sleep before the onset of shift work predicted 40% of the variance in the subjectivequality of daytime sleep after commencing shift work.
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Individual differences in the cortisol-awakening response during the first two years of shift work: A longitudinal study in novice police officers

TL;DR: Assessment of the cortisol awakening response in a group of 25 young novice police officers showed that in the interval between about 4 and 14 months after transitioning from regular day work to rotating shift work, mean values began to rise from baseline to significantly higher levels at about14 months after they commenced shift work.