40 



HARRY H. WYLIE 



(00 



Figure XIV 



Figure XV 



Curve 61 (Figure XIV) is an individual curve from Group Fourteen. Curve 67 

 (Figure XV) is an individual curve from Group Fifteen. Ho izontal lines represent 

 percentage of correct responses. Vertical lines represent the number of series of 

 twenty trials each. In lettering,— A is the end of the learning process with the 

 sound, B (in curve 61) is the end of the learning process with the light, B (in curve 

 67) is the end of the simultaneous series, C (in curve 67) is the end of the learning 

 process with the light. 



