EFFECT OF LENGTH OF BLIND ALLEYS ON MAZE LEARNING 29 



basis of individual, disparate " acts," following in their occurrence 

 some law of chance. "^On the contrary, the various impulses 

 in the random activity of the early trials are gradually and 

 collectively woven into one matrix of successive responses, each 

 setting off the next succeeding one, and all shaped by the whole 





lyj 



ifljii 



9 /O 



3 



BLIND 



4 S 



/ALLEYS 



Figure VI. — Heavy columns, double lines, single lines, and discontinuous lines 

 show, respectively, total entrances by all animals to full length and shortened 

 blind alleys in the B-mazes, and to full length and shortened blind alleys in 

 the A-mazes. Figures above columns give the totals represented. 



