Abstract
Carried out an experiment with 12 enlisted navy men, who performed
3 tasks (a) in 102-db low-frequency noise, (b) at 38./33.C (dry-bulb/wet-bulb
temperatures), (c) with the 2 stresses combined, and (d) in a control
condition. The 3 tasks were tracking with peripheral lights, the
5-choice task, and visual vigilance, in that order. The low-frequency
noise had a beneficial effect upon all 3 tasks. It interacted with
the mild heat on the tracking task and on false detections in the
vigilance task. Results are related to behavioral arousal. When compared
with a previous experiment on mild heat and loss of a night's sleep,
performance in the control conditions was found to be influenced
by the stresses included in the within-Ss experimental designs. This
raises doubts about the validity of the interactions. (26 ref) (PsycINFO
Database Record (c) 2006 APA, all rights reserved)
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