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Adaptating test timing to the sleep-wake schedule: effects on diurnal neurobehavioral performance changes in young evening and older morning chronotypes
Schmidt, Christina; Peigneux, Philippe; Cajochen, Christian et al.
2012In Chronobiology International, 29 (4), p. 482-490
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Keywords :
Adult; Aged; Cognition; Young Adult; Wakefulness; Time Factors; Test Taking Skills; Task Performance and Analysis; Sleep; Neuropsychological Tests; Middle Aged; Psychomotor Performance; Male; Humans; Female; Aging/physiology; Circadian Rhythm; Analysis of Variance; Biological Clocks; Attention; Age Factors
Abstract :
[en] The synchrony effect refers to the beneficial impact of temporal matching between the timing of cognitive task administration and preferred time of day for diurnal activity. Aging is often associated with an advance in sleep-wake timing and concomitant optimal performance levels in the morning. In contrast, young adults often perform better in the evening hours. So far, the synchrony effect has been tested at fixed clock times, neglecting the individual’s sleep-wake schedule and thus introducing confounds such as differences in accumulated sleep pressure or circadian phase that may exacerbate synchrony effects. To probe this hypothesis, we tested older morning and young evening chronotypes with a psychomotor vigilance and a Stroop paradigm once at fixed morning and evening hours and once adapting testing time to their preferred sleep-wake schedule in a within-subject design. We observe a persistence of synchrony effects for overall median reaction times during a psychomotor vigilance task even when testing time is adapted to the specific individual’s sleep-wake schedule. However, data analysis also indicates that time-of-day modulations are weakened under those conditions for incongruent trials on Stroop performance and the slowest reaction times on the psychomotor vigilance task. The latter result suggests that the classically observed synchrony effect may be partially mediated by a series of parameters, such as differences in socio-professional timing constraints, the amount of accumulated sleep need or circadian phase, all leading to differential arousal levels at testing.
Research center :
GIGA CRC (Cyclotron Research Center) In vivo Imaging-Aging & Memory - ULiège
Centre de Neurosciences Cognitives et Comportementales - ULiège
Disciplines :
Neurosciences & behavior
Author, co-author :
Schmidt, Christina  ;  Université de Liège > Département de Psychologie : cognition et comportement > Neuropsychologie
Peigneux, Philippe ;  Université de Liège - ULiège > Centre de recherches du cyclotron
Cajochen, Christian
Collette, Fabienne  ;  Université de Liège - ULiège > Département de Psychologie : cognition et comportement > Neuropsychologie
Language :
English
Title :
Adaptating test timing to the sleep-wake schedule: effects on diurnal neurobehavioral performance changes in young evening and older morning chronotypes
Publication date :
2012
Journal title :
Chronobiology International
ISSN :
0742-0528
eISSN :
1525-6073
Publisher :
Taylor & Francis, Philadelphia, United States - Pennsylvania
Volume :
29
Issue :
4
Pages :
482-490
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Lundbeck-Belgian College of Neuropharmacology and Biological Psychiatry
PAI/IAP Interuniversity Pole of Attraction P5/04
SNSF - Swiss National Science Foundation [CH]
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since 14 January 2012

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