Time Estimates Measured by Reproduction

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Abstract
Four Ss, two adults and two children, were asked to reproduce time intervals. Contrary to expectation, the time estimates can not be described by a single monotonic function of the actual time. However, for each individual, a family of power functions having the same constant exponent can adequately fit the data. Therefore, there are several objectively measured times which are reproduced most exactly for each individual. This fact implies that internal rhythms serve as cues for time estimates. For all Ss, the times reproduced most exactly are shown to be approximately 2 n times 1.5 sec., where n has integer values.