2005
DOI: 10.1080/09291010400028633
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Circadian rhythms in components of attention

Abstract: Attention is a cognitive process crucial for human performance. It has four components: tonic alertness, phasic alertness, selective attention, and sustained attention. All the components of attention show homeostatic (time awake, sleep deprivation) and circadian (time of day) variations. The time course of the circadian rhythms in attention is important to program work and school-related activities. The components of attention reach their lowest levels during nighttime and early hours in the morning, better l… Show more

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Cited by 95 publications
(111 citation statements)
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References 41 publications
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“…The finding that Visual-Motor Control performance was better for individuals tested at longer wake times is consistent with proposed impact of circadian variations on physiological and cognitive processes, which report performance to be worse in the morning and peak later in the day (Valdez et al, 2005). These circadian influences depend on task complexity, variability, and duration (Blatter & Cajochen, 2007), which may account for the lack of relationship with the Visual Sensitivity or Eye Quickness factors.…”
Section: Individual Differencessupporting
confidence: 83%
“…The finding that Visual-Motor Control performance was better for individuals tested at longer wake times is consistent with proposed impact of circadian variations on physiological and cognitive processes, which report performance to be worse in the morning and peak later in the day (Valdez et al, 2005). These circadian influences depend on task complexity, variability, and duration (Blatter & Cajochen, 2007), which may account for the lack of relationship with the Visual Sensitivity or Eye Quickness factors.…”
Section: Individual Differencessupporting
confidence: 83%
“…First, Rowe et al (2007) controlled for both gender (an equal number of males and females) and time of testing (in between participants' peak and off-peak time of day). Gender differences have been found in selective attention (Merritt et al, 2007) as well as in the effects of mood manipulations (Westermann, Spies, Stahl, & Hesse, 1996) and attention is particularly vulnerable to time of day effects (Valdez et al, 2005). It is possible that such minor differences could affect the outcome of the task, supporting that the broadening of attention occurs under some very restricted conditions.…”
Section: Discussionmentioning
confidence: 99%
“…It seems that only highly practiced responses (e.g., constant performance tasks) (Valdez et al 2005) are rather invariant across the day, with all other responses being vulnerable to the time-of-day effect during normal day-night conditions, as they require a certain degree of control over stimuli and responses. Above attentional processes, higher-order cognitive functions, such as working-memory load or executive control, appear to be particularly sensitive to time-of-day modulations (Mikulincer et al 1989).…”
Section: Circadian Influences Differently Affect Distinct Cognitive Pmentioning
confidence: 99%