Ambient temperature and time estimation.

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Abstract
United States Army volunteers made time estimations of 3 classes of standard intervals-small, M = 8.19 sec; medium, M = 23.75 sec; large, M = 44.03 sec.-according to 1 of 2 methods, Production (P) or Verbal Estimation (VE), under 3 ambient temperature conditions, 40[degree] F, 80[degree] F, and 110[degree] F with 50% relative humidity. For all interval classes, time estimates by the P method were significantly smaller under the 40[degree] F and 110[degree] F conditions than those under the 80[degree] F condition. For medium intervals with the VE method, the mean time estimate at 40[degree] F was significantly larger than that at 80[degree] F. It was concluded that, relative to the control condition, the internal clock ran fast under extreme temperature conditions. The results were discussed in relation to Treisman''s (1963) model of the internal clock.

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