“…Finally, previous research has shown that circadian rhythm, and specifically the sleep-wake cycle, is another important factor that influences individual performance on sensory, motor, reaction time, time estimation, and memory tasks (Carrier & Monk, 2000, for a review; Matchock & Mordkoff, 2007;Breimhorst, Falkenstein, Marks, & Griefahn, 2008;Jarraya, Jarraya, Chtourou, Souissi, & Chamari, 2013). In healthy adults who typically sleep from 23:00 to 7:00, peak cognitive performance is often observed during 16:00-22:00 while the lowest levels of performance are reported between 7:00 and 10:00 (Matchock, 2010;Valdez, Ramírez, & García, 2012); however, caffeine and food consumption can alter normal biological rhythms (Valdez et al, 2012).…”