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J. C. DeVOSS and rose ganson 



investigators, namely that red is of low stimulating value for 

 the animals studied. But we may go further and say that blue, 

 and violet are also of low stimulating power for the cat. This 

 suggests the possibility of a much shortened spectrum (i. e. gray 

 band). Yet blue is not confused with black by the cat. 



CONFUSION OF COLORS WITH COLORS 



Since our animals have confused colored papers with grays, 

 even when the textures were as different as those of paper and 

 cambric, they ought presumably to confuse many pairs of colors, 

 all chosen from the same series of papers. To ascertain whether 

 they would do so we tested each cat by presenting for its choice 

 the stimulus color paired in turn with each of the eighty-nine 

 remaining Bradley colors. In each case the behavior of one cat 

 was confirmed by giving the same tests to a second one. As in 

 the work with grays we began with yellow and blue as stimulus 

 colors. 



In the following tables we have included only cases of confusion 

 and of difficult discrimination. The stimulus color was dis- 

 criminated from all of the Bradley papers not named in the 

 tables, and such discriminations were prompt, with but few 

 exceptions. Examples are given in TABLE I (A). The con- 

 fusions in each table are recorded in the order of their occurrence 

 in the experiments, but it must be remembered that discrimina- 

 tions, both easy and difficult, intervened between the confusions 

 in many cases. 



TABLE X (A) 



Confusions Made by Cat 2 



Stimulus Color Yellow. F.E. — 1-2 



