ALCOHOLISM AND BEHAVIOR OF WHITE RATS 



265 



4. Comparison of the test and control rats on the basis of the rate 

 of rummig {speed) 



The relationship between the time and distance records for 

 each rat has been used as the basis of another comparison of the 

 tests and controls, namely, the average speed of running, in terms 

 of the number of centimeters covered per second (as measured 

 on the record sheets). For each rat the distance covered on 

 each day has been divided by the time spent on the same day. 



TABLE 14 

 Average speed {centimeters per second) for training and retention. Plus signs indi- 

 cate that the speed of the controls was greater than that of the tests. The controls 

 in two strains had higher speed; the tests in one strain had higher speed 



From these figures the averages for training and retention for 

 the various combinations of sexes and strains have been obtained 

 for the 'completes' (table 14). In training the speed of the tests 

 is less than that of the controls both for the males and females 

 in strains A and L; but in strain C the males, as well as the 

 females, give the averages for the tests higher than the controls. 

 The same general relations hold for retention, the exception being 

 the males in strain A, which give a higher average for the tests. 

 Putting sexes and strains together gives higher averages for the 

 controls in both training and retention (table 15), but in neither 

 case is the difference significant. In training the difference is 



