RONALD E. MYERS 



483 



The chiasma-sectioned cats were taught visual pattern discrimination 

 responses through one eye. In this procedure, the food-deprived and 

 monocularly masked animals were placed in an enclosed darkened training 

 box (see Fig. 3). The box presented at one end two transilluminated 

 translucent visual patterns held in separate, swinging doors situated side 

 bv side. The different sets of paired patterns used in the experiments are 



Fig. 3 

 Training box used for establishment of pattern discrimination responses. A cat 

 is introduced into starting chamber at the right end of the bo.x. Lifting of doors 

 contained in the mid-panel admits the cat to the choice chamber to the left. The 

 animal chooses by pushing on the swinging doors containing the patterns. 

 Correct choice is rewarded by a morsel of food (see insert). 



portrayed m Fig. 4. A push on the door containing one pattern of a pair 

 was arbitrarily and consistently rewarded by the hungry animal fmding 

 food beyond; a push on the door containing the second pattern of the pair 

 was punished by the door not opening, an annoying buzzer sounding, and 

 sometimes a verbal reprimand being given. Following each such choice 

 occurrence, the animals were trained to return to the opposite end of the 

 box and were removed from the choice situation by intervening panels 

 n 



