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W. T. JAMES 



action. On certain days the negative is weak, and the varia- 

 tion in the behavior is toward increased activity rather than 

 decreased activity, as found in the dogs of A proper. The 

 animals of B-minus are also more disturbed by a sudden 

 change in the laboratory environment than the dogs of A-plus. 

 The food taking reaction was inhibited by the first presenta- 

 tion of any signal. The response is also inhibited when a 

 stranger enters the experimental chamber or any odd sound 

 penetrates the room. These characteristics indicate the ease 

 with which the dogs are excited. Another thing of importance 

 is that although annoyed by the signal for the avoiding 



BEHAVIOR TYPE B- 

 BftCT -SHEPHERD F 2 



Text-figure 99 



reaction, the best members of the group do form an avoiding 

 response. The conditioned salivary reaction, however, and 

 in most cases the food taking response, become inhibited after 

 the signal for the motor response is introduced. 



Another dog of this group is 1152 $ , a bassethound-German 

 shepherd F 2 . As was the case with 308 $ , this dog formed 

 a positive conditioned salivary response to a clicking sound 

 of 120 vibrations per minute, a whistle, and a buzzer, without 

 showing signs of a disturbance or inhibition of the response. 

 The first presentation of any of these signals did lead to 



