Statistical methods for analyzing data on daily activity cycles of primates

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Abstract
Many fields studies on primates have recently been carried out in which quantitative data have been collected using instantaneous scan sampling techniques. However, data collected in this manner are difficult to analyze statistically because of the problem of independence of samples, and a number investigators have analyzed such data incorrectly. In this paper, we evaluate such analyses and suggest alternative techniques that may be more appropriate. Examples are drawn from data on daily activity cycles of Lemur catta and Lemur fulvus.