Difference of
chronotypes makes influence to cognitive performance of individuals in routine duties. In this
paper, 55 subjects with different
chronotypes were subjected to continuous
sleep deprivation for 30 h by using the constant routine protocol, during which core
body temperature was measured continuously, and subjective
sleepiness self-rating and the performance of
selective attention were measured hourly. The results showed that the phase difference of core
body temperature has no significant difference, yet the amplitude and term difference among the three
chronotypes are significant. There was an advance in phase between subjective
sleepiness self-rating and core
body temperature, and the
self-rating
sleepiness of evening type came the latest, and the
self-rating
sleepiness of morning type dissipated the fastest. The
response time of
selective attention showed a 2 h phase delay with subjective
sleepiness self-rating. And the
analysis of core
body temperature showed that the later the
chronotype was, the greater the phase delay was. The correct rate of
selective attention of different
chronotypes were inconsistent with delay of subjective
sleepiness self-rating and core
body temperature. We provide reference for
industry,
aviation,
military, medical and other fields to make a more scientific scheduling/ shifting based on cognitive performance characteristics of different
chronotypes.