18 



STELLA B. VINCENT 



beginning. From the 6th trial on, however, the rate of elimi- 

 nation is below that of the normal maze. For the twenty suc- 

 ceeding trials the average is slightly above 6% and is only 1% 

 less than this at the end. 



The errors are eliminated more slowly in the normal maze. 

 This curve does not reach the 6% level until the eleventh trial. 



100 



10 



to 



V 



bo 



SO 



HO 



3o 



2P 



10 



RATE OF ETU AW/VAT I C/V, TIME AND ERRORS 



B/ac/<-W/wt£, Ti'Tne. 

 A/orm*] 77 n«- 



l^ilds.- S 



45" 



r-^f 



So 



Fig. 7. Curves showing the rate of time and error elimination in the 

 black-white and the normal mazes 



From here on, however, there is a regular decline until, in the 

 eighteenth trial, there is only 1% left to be eliminated. The 

 curve wavers above and below 1% but this is practically the 

 final level. The black- white maze has five times as much left 

 to eliminate at the end as the normal maze. 



