Using Hall's open-field test of emotionality, measures of latency, ambulation, rearing, defecation, urination, and squealing were obtained from 126 male Sprague-Dawley rats for 4 daily sessions. Defecation correlated significantly only with urination. The hypothesis that defecation and ambulation are inversely related was not confirmed. Emotionality, in the rat, is best defined by amount of defecation in the open field.
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