GENETIC TYPE AND THE ENDOCRINES 



563 



is the weak reaction to the negative, even though the signal 

 for shock had been used in the experiment. A performance 

 of this kind can be obtained only in the well balanced animals. 

 Animal 246$, also a bassethound-German shepherd F t , is 

 another typical example of this group (text-fig. 97). The 

 training in this case was not so extensive as that of 251 6 , 

 since the animal died before the experiments were terminated. 

 The training was carried far enough, however, to indicate 

 that she was of the same behavioral type. This dog formed 



LLllL.lL.hL 



Text-figure 97 



conditioned salivary reactions to a clicker rate of 120 vibra- 

 tions per minute, a light hanging above the food pan, a buzzer, 

 and a tactile stimulation on the right shoulder. Negative 

 responses were developed to a clicking rate of sixty vibrations 

 per minute, and to a second tactile stimulation of the right 

 hip. The salivary reactions to the pricker were weaker than 

 those to the clicker, but the development of the response and 

 the course of the negative were the same as in the reaction 

 to the clicker. Motor responses of the foreleg' were formed 

 to a whistle, and to a clicking rate of sixty vibrations per 

 minute. A total of 1S2 signals for the motor reaction had 



