Spatial and tactile discrimination learning in infant rats motivated by homing

Abstract

Abstract Rats 6, 10, and 15 days of age were tested on acquisition and reversal of position and tactile discrimination tasks in a 2‐choice situation using access to the home cage as reinforcement. In the early trials the 6‐day group often failed to respond due to locomotor immaturity. But, despite the missed opportunities, they mastered the position habit in about the same number of choice trials as the 10‐day group. However, the 15‐day group was superior to the 2 younger groups. In tactile discrimination these subgroups differed significantly in learning to select the rough or smooth surfaces both in acquisition and reversal. On both the spatial and the tactile discrimination tasks the animals older than 2 weeks showed improvement in learning ability.

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