Predicting Human Performance II: Laws of the Visual Reaction Time

1971 ◽  
Author(s):  
Warren H. Teichner ◽  
Marjorie J. Krebs
Keyword(s):  
Reaction Time ◽  
Human Performance ◽  
Visual Reaction Time ◽  
Visual Reaction

Effects of Foreperiod and Time on Task on Reaction Time and Movement Time

1992 ◽  
Vol 74 (1) ◽  
pp. 131-144 ◽  
Author(s):  
Roald Arild Bjørklund
Keyword(s):  
Reaction Time ◽  
Motor System ◽  
Human Performance ◽  
Movement Time ◽  
Time On Task ◽  
Visual Reaction Time ◽  
Preparatory Set ◽  
Main Effect ◽  
Visual Reaction ◽  
Main Effects

The study was undertaken to investigate the effects of foreperiod (range 0.5 to 5.0 sec.) and 80 min. time on task (TOT) on reaction time (RT) and three subsequent fractions of movement time (MT) in a visual reaction-time experiment. Main effects of foreperiod and TOT, and an interaction between them appeared on RT. During the first 40 min. TOT, the most rapid RTs were observed at the foreperiods exceeding 1.5 sec., while after 40 min. TOT an increment in RT also emerged at the 5-sec. foreperiod. The interaction indicates that some kind of time-dependent fatigue affects ability to maintain preparatory set mainly with long fore-periods. A main effect of foreperiod was observed on all the three fractions of MT; the measurements lengthened with prolonged foreperiods, indicating that onset of fore-period generates a general preparedness in the motor system. TOT did not affect MT. The study indicates that temporal factors affect the perceptual component of simple human performance more than the motor components.

scholarly journals Effects of High vs. Low Glycemic Index of Post-Exercise Meals on Sleep and Exercise Performance: A Randomized, Double-Blind, Counterbalanced Polysomnographic Study

Nutrients ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1795 ◽  
Author(s):  
Angelos Vlahoyiannis ◽  
George Aphamis ◽  
Eleni Andreou ◽  
George Samoutis ◽  
Giorgos Sakkas ◽  
...  
Keyword(s):  
Reaction Time ◽  
Glycemic Index ◽  
Exercise Performance ◽  
Sleep Onset ◽  
Interval Training ◽  
Sleep Onset Latency ◽  
Onset Latency ◽  
Visual Reaction Time ◽  
Post Exercise ◽  
Visual Reaction

The aim of the current study was to investigate the effect of the glycemic index of post-exercise meals on sleep quality and quantity, and assess whether those changes could affect the next day’s exercise performance. Following a baseline/familiarization phase, 10 recreationally trained male volunteers (23.2 ± 1.8 years) underwent two double-blinded, randomized, counterbalanced crossover trials. In both trials, participants performed sprint interval training (SIT) in the evening. Post-exercise, participants consumed a meal with a high (HGI) or low (LGI) glycemic index. Sleep parameters were assessed by a full night polysomnography (PSG). The following morning, exercise performance was evaluated by the countermovement jump (CMJ) test, a visual reaction time (VRT) test and a 5-km cycling time trial (TT). Total sleep time (TST) and sleep efficiency were greater in the HGI trial compared to the LGI trial (p < 0.05), while sleep onset latency was shortened by four-fold (p < 0.05) and VRT decreased by 8.9% (p < 0.05) in the HGI trial compared to the LGI trial. The performance in both 5-km TT and CMJ did not differ between trials. A moderate to strong correlation was found between the difference in TST and the VRT between the two trials (p < 0.05). In conclusion, this is the first study to show that a high glycemic index meal, following a single spring interval training session, can improve both sleep duration and sleep efficiency, while reducing in parallel sleep onset latency. Those improvements in sleep did not affect jumping ability and aerobic endurance performance. In contrast, the visual reaction time performance increased proportionally to sleep improvements.

scholarly journals EFFECTS OF ACUTE PHYSICAL EXERCISE AND ACUTE MENTAL EXERCISE ON SIMPLE VISUAL REACTION TIME

2019 ◽  
Vol 6 (2) ◽  
Author(s):  
Berkay Kef ◽  
Alperen Elibol ◽  
Ece Şenyiğit ◽  
Hasan Orkun İpsalalı ◽  
Umutcan Gölbaşı ◽  
...  
Keyword(s):  
Reaction Time ◽  
Physical Exercise ◽  
Visual Reaction Time ◽  
Visual Reaction ◽  
Acute Physical Exercise ◽  
Mental Exercise
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