38 



JOSEPH PETERSON 



influenced by the effects of training. The following table (table 

 V) classifies for easy comparison the results of all the rats on 

 the first two trials. The entrances to cul de sac 1 in the A- 

 mazes are not included as all emergences from this blind alley 

 brought the rat to the place of the entrance to the maze. 



TABLE V 

 Full Length Cul De Sacs 



TABLE V — Continued 

 Shortened Cul De Sacs 



It will be noted that in the B-maze the per cent of returns 

 from the shortened cul de sacs are practically equal to those 

 from the full length ones, both for the trained and for the un- 

 trained rats. The returns for untrained rats are not far short 

 of 50%. The shortage is mostly due, no doubt, to the small 

 degree of learning that took place in the process of the first 



