How many diurnal types are there? A search for two further “bird species”

Putilov, Arcady A.; Donskaya, Olga G.; Verevkin, Evgeniy G.

doi:10.1016/j.paid.2014.08.003

Cited by 47 publications

(35 citation statements)

References 29 publications

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“…a sleep-promoting process associated with accumulation of sleep debt during wakefulness). This assumption (Putilov 2014;Putilov et al 2015) seems to be in agreement with the conceptualization of the drives for wake and sleep as the two major opponent processes of sleep-wake regulation (Edgar et al 1993;Dijk & Czeisler 1995).…”

Section: Methodssupporting

confidence: 84%

“…The model-based simulations of alertness-sleepiness time courses were performed using our model (Putilov 2014) that was earlier applied for simulating differences in the waveform of alertness-sleepiness fluctuations of morning-and evening-oriented people (Putilov 2014;Putilov et al 2015). The model interprets a waveform of an overt circadian rhythm as resulting from the additive interaction of a pair of homeostatic processes.…”

Section: Methodsmentioning

confidence: 99%

“…However, the switches between two (buildup and decline) phases of this process cannot be intentionally modified, as it was proposed for the somnostatic regelation of sleep (Borbély 1982;Daan et al 1984;Putilov 1995). Instead, the times of these switches were suggested to be controlled by the circadian pacemaker (Putilov et al 2015). In this model, the initial time points for the buildup and decline phases of the homeostatic process, t 1 and t 2 , might be interpreted as the analogues of the time points of initiation and termination of the melatonin synthesis controlled by the circadian pacemaker.…”

Section: Methodsmentioning

confidence: 99%

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Three dimensions of individual variation in phase angle between sleep timing and timing of nocturnal rise of the feeling of sleepiness

Putilov

2014

Biological Rhythm Research

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Studies of melatonin and body temperature rhythms revealed that women, younger adults, and morning-oriented types show a relatively larger phase angle between entrained circadian phase and sleep timing than men, older adults, and evening-oriented types, respectively. However, none of these studies has been designed to compare participants representing all these three dimensions of individual variation. Since daily fluctuations in self-reported level of alertness-sleepiness closely follow the circadian rhythms of melatonin and body temperature, one can predict that a study of circadian phase characteristics of fluctuations of sleepiness shell reveals identical sex-, age-, and diurnal type-related differences in phase angle between circadian phase and sleep timing. Analysis of self-scorings of alertness-sleepiness provided by 130 healthy participants of sleep deprivation experiments confirmed this prediction. It seems that both fundamental research and field studies of sleep-deprived individuals can benefit from the evaluation of circadian phase through self-assessment of nocturnal rise of alertness-sleepiness.

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Section: Methodssupporting

confidence: 84%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Three dimensions of individual variation in phase angle between sleep timing and timing of nocturnal rise of the feeling of sleepiness

Putilov

2014

Biological Rhythm Research

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“…Their sleepiness was measured subjectively and objectively throughout the experiment. Only a small fraction of data on such sleepiness measures was used in the present analysis and more details on applied methods were reported in the previous publications (Putilov, 2015c;Putilov & Donskaya, 2016;Putilov, Donskaya, & Verevkin, 2015, 2017Putilov, Donskaya, Verevkin, & Putilov, 2010). Each of participants denied a history of mental or sleep disorders, any current health problems, and involvement in shift work or trans-meridian flights during the preceding month.…”

Section: Methodsmentioning

confidence: 99%

Validation of Nighttime Sleepability Scale Against Objective and Subjective Measures of Sleep Quality

Putilov¹

2016

Sleep Hypn

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Quick self-assessment of night sleep quality with reliable and valid instruments is often required in various fundamental and applied studies in the field of sleep medicine and chronomedicine. Individual differences in sleep quality are usually assessed with a special scale, whereas such a scale is absent in most of questionnaires for evaluation of individual differences in the domain of chronobiology. One of two exceptions is the 6-scale Sleep-Wake Pattern Assessment Questionnaire. It contains the 12-item scale S designed to self-assess nighttime sleepability. The purpose of the present report was to examine external validity of this scale by searching for correlates and predictors of S score. One hundred and sixty participants of sleep deprivation experiments self-reported their sleep latency, total sleep duration, nap frequency, and times for going to bed and awakening for one week prior to the experiment. Their objective and subjective sleepiness after sleepless night was measures in the course of experiment. Moreover, sleep latency and total sleep duration were measured by means of polysomnography in studies with 35 female participants. Other objective measurements included percentages of sleep stages, awakenings after sleep onset, and sleep efficiency. Additionally, sleep latencies were detected during 9 day-and nighttime 20-min napping attempts of 15 from 35 participants. It was found that significant correlates and predictors of S score include subjective and objective measures of sleep latency, percentage of slow wave sleep, subjectively and objectively assessed sleepiness, and self-reported total sleep time. These results provided solid evidence for external validity of scale S.

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“…These studies assessed circadian preference as a one-dimensional continuum from morningorientation to evening-orientation. However, the one-dimensional approach of morningness-eveningness has been challenged by findings supporting morningness and eveningness to be two only weakly correlated dimensions Lipnevich et al, in press;Scherrer, Roberts, & Preckel, 2016;Putilov, Donskaya, & Verevkin, 2015). Thus, a two-dimensional approach might be a more appropriate conception of circadian preference than a one-dimensional one.…”

Section: Introductionmentioning

confidence: 99%

Why Do Larks Perform Better At School Than Owls? The Mediating Effect Of Conscientiousness

Eberspach¹,

Fenske²,

Groten³

et al. 2016

IOJES

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Circadian preference refers to individuals' preference for morning or evening activities. Its two dimensions (i.e., morningness and eveningness) are related to a number of academic outcomes. While morningness shows positive relations with academic achievement, eveningness shows negative relations. Further, morningness and eveningness show the same correlational pattern with conscientiousness (i.e., positive relations for morningness, negative relations for eveningness), which -in turn -predicts academic achievement. Therefore, the main aim of the present study was to investigate if the relation between circadian preference and academic achievement was mediated by conscientiousness. The sample comprised 422 students attending the 11th grade at a grammar school in Germany. Circadian preference (morningness and eveningness) and conscientiousness were assessed by self-report questionnaires; academic achievement was operationalized by school grades. Using confirmatory analyses and structural equation modelling, the results supported the assumption that conscientiousness mediates the relation between circadian preference and academic achievement. Implications for research into circadian preference and for education are discussed.

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How many diurnal types are there? A search for two further “bird species”

Cited by 47 publications

References 29 publications

Three dimensions of individual variation in phase angle between sleep timing and timing of nocturnal rise of the feeling of sleepiness

Three dimensions of individual variation in phase angle between sleep timing and timing of nocturnal rise of the feeling of sleepiness

Validation of Nighttime Sleepability Scale Against Objective and Subjective Measures of Sleep Quality

Why Do Larks Perform Better At School Than Owls? The Mediating Effect Of Conscientiousness

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