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Biological Rhythm Research Volume 45, 2014 - Issue 1
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Articles

Diurnal variations of cognitive performances in Tunisian children

Sana JarrayaResearch Laboratory “Sports Performance Optimization”, National Center of Medicine and Science in Sports (CNMSS), Bp263, Ave Med Ali Akid, 1004 El Menzah, Tunis, Tunisia.;Research Unit, High Institute of Sport and Physical Education, Sfax University, Sfax, Tunisia.Correspondence[email protected]
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Mohamed JarrayaResearch Laboratory “Sports Performance Optimization”, National Center of Medicine and Science in Sports (CNMSS), Bp263, Ave Med Ali Akid, 1004 El Menzah, Tunis, Tunisia.;Research Unit, High Institute of Sport and Physical Education, Sfax University, Sfax, Tunisia.
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Nizar SouissiResearch Laboratory “Sports Performance Optimization”, National Center of Medicine and Science in Sports (CNMSS), Bp263, Ave Med Ali Akid, 1004 El Menzah, Tunis, Tunisia.;High Institute of Sport and Physical Education Ksar Said, Manouba University, Tunis, Tunisia.
Pages 61-67 | Received 13 Mar 2013, Accepted 25 Mar 2013, Published online: 27 Jun 2013
 
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Abstract

The aim of this study was to investigate the effects of time-of-day on cognitive performance in Tunisian children in terms of constant attention (CA) and choice reaction time. The protocol involved 132 children (age: 10 ± 0.7 years) who performed two cognitive tasks, a choice-reaction test and the barrage test (measuring CA), at 09:00, 11:00, 14:00, and 16:00 h on four consecutive Thursdays. The results showed significant time-of-day effects with both tests and also core temperature, with best performances and highest core temperatures at 16:00 h. However, the profiles of the rhythms were not the same. Therefore, Thursday afternoons seem to be the best time for new learning in Tunisian children.

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