Effects of Illness (Phlebotomus Fever) on Sustained Performance and Muscular Output

Morgan, Ben B.; Coates, Glynn D.; Alluisi, Earl A.

doi:10.1177/001872087301500107

Hum Factors

1973

DOI: 10.1177/001872087301500107

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Effects of Illness (Phlebotomus Fever) on Sustained Performance and Muscular Output

Ben B. Morgan

Glynn D. Coates

Earl A. Alluisi

Abstract: During a period of illness with Phlebotomus fever, decrements in the performances of eight experimental subjects were found to be approximately 18% in average work efficiency (sustained performance) and 14% in average muscular output. Both aspects of performance had recovered completely four days after the day of peak illness. Analyses of 24 biomedical indices of infection were also computed, and the average biomedical response was found to have decreased approximately 26% during illness without recovery to no… Show more

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Cited by 4 publications

References 8 publications

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Effects of Sandfly Fever on Isometric Muscular Strength, Endurance, and Recovery

Ea¹,

Wr²,

Ls³

1980

Journal of Motor Behavior

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The isometric muscular strength and endurance of 10 male volunteers were measured four times per day for 15 consecutive days. Eight experimental subjects were inoculated with sandfly fever virus and two double-blind controls were given sterile saline on the seventh day. The muscular performances of the control subjects remained essentially constant throughout. Decrements in muscular strength and endurance occurred with the experimentals during the brief period of illness three or four days after inoculation, then performances improved towards baseline levels.

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Effects of Sandfly Fever on Isometric Muscular Strength, Endurance, and Recovery

Ea¹,

Wr²,

Ls³

1980

Journal of Motor Behavior

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The Range and Consistency of Individual Differences in Continuous Work

1980

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Two five-man teams were trained to asymptotic levels of synthetic-work performance on a multiple-task performance battery (MTPB) which required subjects to time share five individual-performance tasks and one group-performance task. Each team was then exposed four times to continuous-work and sleep-loss stresses in a repeated-measures design. Performance levels were measured in terms of 13 individual-task measures and a general mean-percentage-of-baseline measure. Individual performance decrements were found to range from 0 to 40% below prestress levels. The findings also indicated that subjects responded consistently across the four exposures to continuous work and sleep loss. Furthermore, the subjects experienced a general performance decrement across all tasks rather than a task-specific one. These findings are discussed in terms of their important implications for the design of man-machine systems and the selection of operators who are most resistant to sleep-loss stress.

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Effects of Occupational Exposure to Inorganic Lead on Neuromuscular Functioning

Repko

Nicholson

Morgan

1974

Proceedings of the Human Factors Society Annual Meeting

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In an i n v e s t i g a t i o n o f the b e h a v i o r a l e f f e c t s o f Occupational Exposure t o lead, n i n e t e e n measures of neuromuscular performance and f i v e measures o f t h e body burden of l e a d were obtained from 316 experimental and 1 1 2 c o n t r o l s u b j e c t s . The experimental s u b j e c t s were v o l u n t e e r s from among worhers exposed t o i n o r g a n i c lead a t t h e i r jobs i n t h r e e s t o r a g e (lead-acid) b a t t e r y manufact u r i n g companies; t h e c o n t r o l s were v o l u n t e e r s from companies involved i n o t h e r various t y p e s o f l i g h t manufacturing. neuromuscular f u n c t i o n i n g and body burden of l e a d were determined through t h e use o f c o r r e l a t i o n and m u l t i p l e -r e g r e s s i o n analyses. analyses suggest t h a t f u n c t i o n a l c a p a c i t y decreased i n t e r m of tremor and eyehand coordination but increased i n terms of muscular s t r e n g t h . In a d d i t i o n , t h e d a t a suggest t h a t t h e s e changes occur on t h e p r e f e r r e d s i d e and a t blood-lead l e v e l s between 70 and 79 micrograms p e r cent, I n s t i t u t e f o r Occupational S a f e t y and Health, Department of Health, Education and Welfare, under Contract No. HSM 99-72-123, "Evaluation of Behavioral Functions i n Workers Exposed t o Lead," The authors wish t o acknowledge t h e i r s u b s t a n t i a l indebtedness t o t h e following persons who were involved i n various phases of t h i s research

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Effects of Illness (Phlebotomus Fever) on Sustained Performance and Muscular Output

Cited by 4 publications

References 8 publications

Effects of Sandfly Fever on Isometric Muscular Strength, Endurance, and Recovery

Effects of Sandfly Fever on Isometric Muscular Strength, Endurance, and Recovery

The Range and Consistency of Individual Differences in Continuous Work

Effects of Occupational Exposure to Inorganic Lead on Neuromuscular Functioning

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