36 



HARRY H. WYLIE 



Figure XI 



Figure XII 



Figure XIII 



Curve 91 fFiKure XI) is an individual curve from Group Eleven. Curve 90 

 ("Figure XII) is an individual curve from Group Twelve. Curve 88 (Figure XIII) 

 is an individual curve from Group Thirteen. The horizontal lines represent the per- 

 centage of correct responses. The vertical lines represent the number of series of 

 20 trials each. In lettering.^A is the end of the learning of the hght, B, m curve 

 91, is the end of the learning with the electric shock, and is the end of the simul- 

 taneous series in curves 90 and 88, C is the end of the learning process with the elec- 

 tric shock. 



