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Anthony Sucec

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Publications by Anthony Sucec (bibliography)

1995

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Williams, Diane, Englund, Carl E. and Sucec, Anthony (1995): Cognitive Effects of Chemical Protective Clothing, Exercise, and Antihistamine. In: Proceedings of the Human Factors and Ergonomics Society 39th Annual Meeting 1995. p. 951.

“The cognitive performance effects of some stressors like those experienced in military training and combat were determined in a field experiment. The effects of wearing chemical protective (CP) clothing (MOPP IV), walking 16-24 miles while carrying a heavy backpack, and taking a standard dosage of diphenhydramine, an antihistamine, were investigated on 72 Marines during a 32-hr sleep-deprivation experiment. Tests of reaction time, spatial ability, memory, and logical reasoning were administered, and scored for accuracy, reaction time, lapses, and correct per minute. The data indicate that either wearing CP clothing for an 11-hr period or prolonged moderate exercise produces general cognitive impairment in sleep-deprived subjects. Taking antihistamine produces minimal cognitive impairment. Interestingly, there was no evidence of a synergistic effect of multiple stressors. Contrary to previous suggestions, the performance decrements produced by wearing CP clothing are not solely due to the physical effects of the clothing such as the mask limiting the field of view, or gloves impairing dexterity. Some cognitive performance decrements due to wearing CP clothing resulted from general cognitive impairment. These decrements are unlikely to be eliminated by redesign of the mask and gloves. An effect size analysis across the 13 tests revealed a medium effect of wearing CP clothing when effects due to physical limitations of the clothing were eliminated, and a small effect of exercise for all scorings except reaction time where there was no evidence of any effect. These results suggest that if a job is near the limit of a person's cognitive abilities, performance may suffer if wearing CP clothing or prolonged moderate exercise is required.”

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