632 W. T. JAMES 



bassethound-German shepherd and an F 2 of the same cross) 

 as active as the pure Saluki and shepherd types. As a rule, 

 those animals which are excitable under laboratory condi- 

 tions are also excitable in the kennels, but this is not true 

 in every case. The animals of type A sleep or are inactive 

 the greater part of the day. Some of the dogs of type B, 

 on the other hand, move almost continuously. They run or 

 walk back and forth, play and bark. They react to the animals 

 in nearby kennels, to distant noises, to people passing by, 

 or to wind variations. They are easily aroused from sleep, 

 and are the first to give warning when anyone enters the 

 kennel lot. It should be emphasized that age is a factor in 

 activity. Naturally, the older animals are less active than 

 the younger of each breed. It is for this reason, for example, 

 that the German shepherd 438 $ , and the bassethound 83 $ 

 are less active than some of the other members of the group. 

 The thing of importance, however, is that animals 438 9 and 

 83 $ are not of equal activity, although of about the same 

 age. 



SUMMARY AND DISCUSSION OF BEHAVIOR AND ITS 

 RELATION TO PHYSICAL TYPE 



A study was made of the range of behavior found among 

 the dogs under two experimental conditions, namely adjust- 

 ment to food taking and the formation of a conditioned 

 avoiding reaction. Of a total of fifty-two dogs used in this 

 series of experiments, all but a few could be trained and 

 given a definite classification. In those that could not be 

 trained, a definite behavior pattern interfered with the forma- 

 tion of a satisfactory adjustment. 



Under each experimental procedure, there are highly active, 

 highly inactive, and intermediate types. Certain animals fall 

 into either the active or inactive classification under any 

 experimental condition, while others fall into the active group 

 in one experimental situation, and into the inactive group 

 in another. The dogs with the greatest variations in behavior 



