26 Journal of Comparative Neurology and Psychology. 



TABLE IV. 



J's Reactions to Blue- Yellow. 



A — With Stimulus Constant. 



B — With Stimulus Variable. 



8-16 Min. blue was thrown in for the first time. Monkey was entirely confused. After jerking 

 him back vigorously for several trials, he began to go always over to left, out of range of beam; 

 then, after remaining still for a moment, he would suddenly thrust out his paw to open left-hand 

 box regardless of color exposed there. I tried in many ways to overcome this position error, even 

 to the extent of allowing him to react as in the beginning, to max. yellow and blue with no changes, 

 but the error was not overcome in the time at my disposal. 



