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W. T. JAMES 



active, especially after the training- had progressed for a 

 long 1 period, but a sudden and violent reaction occurred as 

 soon as the signal was applied. This quick succession of 

 extreme inhibition and high excitement was not observed in 

 other dogs. Thus it seems that the amplitude of the phases 

 of inhibition and excitation is greater in the bulldog. The 

 bulldog is like the animals of group B in that it retains a 

 vigorous reaction for a long period of time; it is like the 



Text-figure 109 



animals of A-plus in that although the negative is weak at 

 first, it becomes stable after a period of training. In the 

 latter part of the training the bulldog would not orient to 

 the food pan during the negative signal (pi. 105, fig. 1). As 

 soon as the positive signal for food was applied, however, 

 the animal would go into violent action with quick orientation 

 responses, growling, shifting of the front feet, and pawing 

 at the food pan. Because of this wide behavioral pattern, 

 which the dog was unable to limit to specific components, it 



