The mean percentage of baseline performance, a measure of average work efficiency, fell approximately 33% during the period of illness (P. tularensis) of 8 experimental Ss. Four days after treatment, individual performance equaled that of controls (3 double-blind hospital control Ss and a separate control group of 10 Ss), but group-task performances appeared not to have recovered so completely. The findings extend and essentially support those of a previous study (Alluisi, et al., 1971) in which the illness-related decrement in individual performance averaged 25%, with only incomplete recovery 3 days after treatment.
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