482 



H. M. JOHNSON 



curve. The analysis of such a curve is said by Davenport to 

 be very laborious, and I have not yet found time to attempt it. 

 Meantime, the constants of dispersion and of reliability which 

 are presented are not to be regarded as the closest possible 

 approximations to the true values. 



13 25 30 35 40 45 50 



tt 25 30 35 40 45 50 



w 30 35 40 45 ' SO 25 30 35 40 45 50 



FIG. 4. PERCENTAGE DISTRIBUTION OP REACTION-TIMES OF SUBJECT 



Ordinates, percentages of reactions. Abscissae, time in units of 0.01 second. 



Graph 5. Light line, 693 left hand reactions under condition Bi. 



Graph 5. Heavy line, 700 left hand reactions under condition D\. 



Graph 5. Light line, 693 left hand reactions under condition BI. 



Graph 5. Heavy line, 696 left hand reactions under condition B 2 . 



Graph 7. Light line, 694 right hand reactions under condition BI. 



Graph 7. Heavy line, 694 right hand reactions under condition Di. 



Graph 8. Light line, 694 right hand reactions under condition B\. 



Graph 8. Heavy line, 694 right hand reactions under condition BZ. 



Vertical lines indicate averages. 



