EEWARD AND PUNISHMENT IN HABIT FORMATION 



263 



FIG. 4. CURVE OF RELATIVE VALUES OF HUNGER AND ELECTRIC SHOCK 



Abscissa represents the strength of stimuli and the degrees of hunger; ordinate 

 represents the average total number of trials required for the perfecting of the 

 habit. The upper curve represents the relative values of tne four different de- 

 grees of hunger and the lower the relative values of the four strengths of electric 

 shock. 



