Abstract
Daily 1 h samples of activity-wheel performance yielded activity records in which the 4–5 day estrous cycle was evident in 23 of 36 albino rats. Mean activity level was still increasing at the conclusion of 60 daily periods of measurement, but a correlational analysis revealed marked stability of relative activity level.
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1. This research was supported by Research Grant HD 00867-05 from the National Institute of Child Health and Human Development.
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Hitt, J.C., Gerall, A.A. & Giantonio, G.W. Detection of estrous activity cycle by 1-hour samples of running behavior. Psychon Sci 10, 159–160 (1968). https://doi.org/10.3758/BF03331459
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DOI: https://doi.org/10.3758/BF03331459