Abstract
Cage activity of six California antelope ground squirrels was measured twice daily (morning and night) under six levels of ambient illumination (dark, less than 1.0, 2.5, 5.0,. 25.0, 50.0 ft c). Analysis of variance indicated that the Ss were significantly more active in the morning than at night under all levels of illumination. In addition, the Illumination by Time of Day interaction was significant. Increasing levels of illumination produced decreasing cage activity in the morning, but did not significantly affect cage activity at night. Results are discussed in comparison to earlier measures of cage activity with the nocturnal Virginia opossum.
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Note
This research was partially supported by Grant No. 8469 from the National Science Foundation to Southern Methodist University. The study was conducted according to the APA statement of “Principles for the care and use of animals,” June 26, 1968. Reprints may be obtained from Patrick E. Campbell, Department of Psychology, Southern Methodist University, Dallas, Tex. 75222.
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Cone, A.L., Cone, D.M. Cage activity in the California antelope ground squirrel. Psychon. Sci. 17, 301–302 (1969). https://doi.org/10.3758/BF03336542
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DOI: https://doi.org/10.3758/BF03336542