ALCOHOLISM AND BEHAVIOR OF WHITE RATS 



245 



TIME PER TRIAL 



FREQUENCY DISTRI BUTIONS OF RATIOS 

 OF EACH TRIAL TO A STANDARD 



FREQUENCIES 

 450 



CONTROLS 



O.iav 7.562. -1. 9371 

 SCALEOF RATIOS «•' 2.312 



CLASS WIDTH 2.625 



FREQUENCIES 



J87 7.762 ex>37 d.3 1 2 2.587 ,-,I.S62 2.587 4.3 12 6J337 7.762 9.487 



-; {-) ■--; (-1 (-) TO ^+' <•+' <+) '•+•' •■+> 



^+J|.862 



SCALEOF RATIOS 



CLASS WIDTH 1.725 



Fig. 6 Distributions of the ratios obtained by dividing each time record into, 

 or by, the assumed standard for the corresponding trial in the training; 'plus' 

 ratios, those at the right of the central point, were obtained when the record was 

 larger than the standard, and so divided by the standard; 'minus' ratios, those 

 at the left, were obtained when the record was smaller than the standard, and 

 so divided into the standard. These ratios are grouped into classes of two 

 widths, 2.625 and 1.725 wide, respectively. The numbers on the base lines are 

 the outer limits of the ratios included in the classes; the vertical scale gives the 

 numbers of ratios in each class. Broken lines show the tests; solid lines, the 

 controls. These distributions have been used for the application of the x" test. 



