A vast body of knowledge within the field chronobiology highlights a broad array important effects that circadian rhythms and chronotypes have on individual performance. Circadian are predictable fluctuations energetic activation produced by an internal pacemaker, clock, governs daily functioning human mind. Chronotypes differences in setting this biological clock influence preferences for opti...

BACKGROUND Chronotype refers to individuals' preference for morning or evening activities. Its two dimensions (morningness and eveningness) are related to a number of academic outcomes. AIMS The main goal of the study was to investigate the incremental validity of chronotype as a predictor of academic achievement after controlling for a number of traditional predictors. In so doing, a further...

Objectives: The aims of this study were to evaluate patterns of circadian preferences and daytime sleepiness, and to examine the extent to which the consumption of stimulant beverages is associated with daytime sleepiness and evening chronotype among Peruvian college-age students. Methods: A total of 2,581 undergraduate students completed a self-administered comprehensive questionnaire that gat...

This empirical cross-sectional study explored the effect of chronotypes on classroom behaviour. One hundred and forty young Portuguese children, from 1st to 4th grades, were examined regarding their chronotype disruptive behaviours occurring in classroom. Three groups (i.e., morning, intermediate evening) identified. The Chronotype Questionnaire for Children evaluated Conners Scale - reduced ve...

For humans, activity during the night is correlated with multiple pathologies that may reflect a lack of harmony among components of the circadian system; however, it remains difficult to identify causal links between nocturnal activity and different pathologies based on the data available from epidemiological studies. Animal models that use forced activity or timed sleep deprivation provide ev...

The authors examined how time orientation and morningness–eveningness relate to 2 forms of procrastination: indecision and avoidant forms. Participants were 509 adults (M age = 49.78 years, SD = 6.14) who completed measures of time orientation, morningness–eveningness, decisional procrastination (i.e., indecision), and avoidant procrastination. Results showed that morningness was negatively rel...