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Rearing History and Differential Solution Exposure Effects on Two-Bottle Saline Preference

Roderick Wong
The American Journal of Psychology
Vol. 93, No. 1 (Mar., 1980), pp. 147-152
DOI: 10.2307/1422110
Stable URL: http://www.jstor.org/stable/1422110
Page Count: 6
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Rearing History and Differential Solution Exposure Effects on Two-Bottle Saline Preference
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Abstract

Rats were given either water or 0.9% NaCl solution as their only source of fluid, from weaning until 70 days of age. The animals given only saline solution consumed more than those given only water. The animals were then exposed to either a bottle of water or one of a 0.9% NaCl (isotonic), or of 2.0% NaCl (hypertonic) for 24 hr and then were tested with 0.9% NaCl and water for four days. The results indicated differential effects of early fluid rearing on the rats' later preference. The only groups showing a significant change was that of the water-reared rats given 24 hr exposure to hypertonic or isotonic saline before the two-bottle test. Those exposed to hypertonic saline before the perference tests showed greater suppression of saline preference than those exposed to isotonic saline before the tests.

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