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Infantile Handling and Adult Visual Stimulus-Seeking Behavior in Mice

Experimental mice were handled daily from birth to weaning, whereas, the control animals were not disturbed. At adulthood the animals were tested on two consecutive trials for visual stimulus-seeking behavior in a Greek-cross maze with black, white, striped, and squared arms. Two measures were taken, frequency of entrance into each compartment, and a 10-sec. time sampling of each animal's location during each 180-sec. trial. A significant effect for compartment for both the handled and nonhandled groups was noted for frequency of entrance and a significant preference for the visually complex compartments for the handled animals over controls. Early handling probably results in significant stimulus-seeking behavior for visually complex environments.