Abstract
The gross behavior of two comparable groups of normal Ss including men, women, and children was measured continuously over a 2-wk. interval by noise and activity recordings. The second group differed from the first in that no clocks or other mechanical means of recording time were available. Both groups were under relatively identical conditions of isolated confinement in a simulated fallout shelter. Normal cues as to passage of time were not available due to the construction characteristics of the experimental chamber. Thermal and ventilation conditions were maintained at optimal levels. Both measures revealed highly positive correlations between the mean circadian patterns of the two groups. Noise and activity were also highly correlated within groups. Longitudinal comparisons of daily means revealed slightly decreasing noise trends after the fourth day of confinement. Such a trend was not generally apparent in either of the longitudinal activity plots.
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