The effect of heat on the precision and speed of the work in men by the battery method under experimental condition

The results of some studies show that the physical harmful agents such as heat can impress the cognitive performance. Hence, this study aimed to examine the effect of heat on the precision and speed of the performance in men by the battery method under experimental condition.
this interventional study was conducted on 56 male students in the laboratory of atmospheric conditions in Health School of Isfahan University of medical sciences. At the first, the subjects rested and their demographic information was collected. Then, the participants were divided to two groups including case (30% relative humidity, 35 °C air temperature) and control (40% relative humidity, 20 °C air temperature). They performed the battery tests including two hand harmony tests in clockwise and counterclockwise directions, V Piron test, and the precision targeting vibration meter at 0, 40, 80 and 120 min after the starting time. Then, the number of errors (related to precision) and the duration of the performed test (speed) were recorded by researcher.
The results of variance analysis showed that the mean values of the precision which obtained by battery tests were significantly different in two groups (P 0.09).
The results of this study showed that heat can influence high cognitive demand jobs through reducing the precision which may lead to decreased performance and increased unsafe acts.