Reference : Adaptating test timing to the sleep-wake schedule: effects on diurnal neurobehavioral pe...
Scientific journals : Article
Social & behavioral sciences, psychology : Neurosciences & behavior
http://hdl.handle.net/2268/107964
Adaptating test timing to the sleep-wake schedule: effects on diurnal neurobehavioral performance changes in young evening and older morning chronotypes
English
Schmidt, Christina mailto [> >]
Peigneux, Philippe mailto [Université de Liège - ULg > > Centre de recherches du cyclotron >]
Cajochen, Christian [> >]
Collette, Fabienne mailto [Université de Liège - ULg > Département de Psychologie : cognition et comportement > Neuropsychologie >]
2012
Chronobiology International
Taylor & Francis
29
4
482-490
Yes (verified by ORBi)
International
0742-0528
1525-6073
Philadelphia
PA
[en] aging ; cognition ; chronobiology
[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.
Centre de Recherches du Cyclotron - CRC ; Centre de Neurosciences Cognitives et Comportementales
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; Lundbeck-Belgian College of Neuropharmacology and Biological Psychiatry ; PAI/IAP Interuniversity Pole of Attraction P5/04 ; Swiss National Foundation
Researchers ; Students
http://hdl.handle.net/2268/107964

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