MORPHOLOGICAL FORM AND ITS RELATION 

 TO BEHAVIOR 



A STUDY OF THE BEHAVIOR OF PURE BREED AND HYBRID DOGS BY 

 CONDITIONED SALIVARY AND MOTOR REACTIONS 



INTRODUCTION 



In the foregoing sections the significance of the genetic 

 constitution and its relation to endocrine influences in the 

 determination of development have been considered in dif- 

 ferent types of dogs. The organism has been treated as a 

 developing entity, and the genetic and endocrine factors have 

 been studied in their relation to the morphological form 

 resulting from their integration. One of the most significant 

 things about a living organism, however, is its activity, or 

 responsiveness to external stimuli, and no study on constitu- 

 tion would be complete without a consideration of this phase 

 of the problem. 



The author wishes to express appreciation for the aid and 

 advice of Dr. Charles R. Stockard during the course of these 

 experiments. His continued encouragement and suggestions 

 led to the classification of the complicated behavioral data 

 presented here. It is hoped that the material reported will 

 play some part in emphasizing the significance of treating 

 behavior in relation to constitution. 



The relationship between an organism and its environment 

 after birth is dominated by the action of the nervous system, 

 and this action is dependent on and related to the activity 

 of every other part of the body. This means that a har- 

 monious relationship must exist between the nervous system 

 and bodily organs, including the endocrine glands, before 

 an adequate adjustment can result from their integration. 



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