GENETIC TYPE AND THE ENDOCRINES 



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Text-figure 101. (1) A typical conditioned avoiding reaction of one of the 

 mid-group animals. (The reaction of the leg is indicated by the third line from 

 the top.) The leg is raised shortly after the signal begins and is held in the 

 avoiding position until the signal ceases. Note that the signal precedes the shock 

 for 5 seconds and is then coincident with shock for 5 seconds. (2) A typical 

 reaction of the animals of group A to the conditioning signal and shock. After 

 a short period of training, they respond only to the shock. Note the lack of 

 movement on the part of the animal in the interval between signals. (3) 

 Characteristic reaction of the active group B in the conditioned avoiding situation. 

 The response is characterized by a short latent period and a variety of postural 

 movements which are superimposed on the avoiding reaction. 



