Temperature acclimatization, response strength, and thermal preferences in the rat.

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Abstract
Three experiments are reported concerned with the effects of temperature acclimatization on R strength. The 1st dealt with the performance of cold-acclimatized rats in a normal temperature runway when trials having competing Rs are included in or excluded from the average speeds. The 2nd was concerned with the interaction of temperature acclimatization and food deprivation on running speed. Both experiments lend some support to a previous proposal that the metabolic heat production is part of a generalized drive mechanism. The 3rd experiment, performed largely as a control question, scaled the preferences of differently acclimatized rats for air temperature exposures. The results did not detract from the metabolic hypothesis and, in addition, provided specific data on the nature of temperature-preference functions.

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