36 



BRIZZEE, JACOBS, KHARETCHKO AND SHARP 



TABLE III 



Summary Table for the Analysis of Variance of the 

 Date from the Locomotor Experiment 



p =z .01). Figure 7 represents the mean number of errors plotted against 

 trials. One can see that the full-body group did not learn as rapidly as did 

 the control and half-body groups and that the control and half-body groups 

 were very similar. An analysis of variance of these data and the equivalence 

 of the curves for the nonirradiated and half-body groups suggests that 

 (a) the full-body group learned significantly more slowly than the other two 

 groups, and (b) the effects of irradiating the mother with the uterus shielded 

 did not cause a decrement in the future maze learning ability of their fetuses. 

 Quantitative histologic methods in 50-day animals from the groups sub- 

 jected to the behavioral tests revealed essentially the same differences be- 

 tween full-body (320 r) groups and controls as were observed in the 20-day 

 animals of the .300 r group described previously. That is, the only significant 



Half-body 



Controls 



Full-body 



Fig. 7. The mean number of errors for each group across trials. The data points 

 were computed on the assumption that once a rat reached criterion he would make 

 no more errors on successive trials. 



