Abstract

Offspring were either adequately nourished or undernourished during the suckling period. They had free access to food from weaning, and were given 2 behavioral tests between 13 and 19 weeks of age. Motivation for water was tested on a variable interval (VI) schedule at 3 levels of deprivation and a test of light-dark discrimination made at 23.5 hr of water deprivation. The results indicated (1) no clear difference in VI response rate, but (2) significant differences in discrimination performance between the 2 groups. A learning ability or certain relevant abilities rather than motivation for water appeared responsible for the difference in discrimination learning.

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