294 



LINUS WARD KLINE 



Subject K = 



Subject I = 



Subject J = 



Ordinates indicate time in seconds to place one card. Abscissas indicate the 

 number of periods of practice. 



h If 



A n 'ft 

 GRAPH II. STIMULUS CURVES 



p, T f Pleasant Stimulus: Subject A = 



\Unpleasant Stimulus: Subject F = 



Plan II Pleasant Stimulus: Subject D = 



