AN ANALYSIS OF THE LEARNING PROCESS IN THE SNAIL 63 



TABLE XI 



Showing the number of correct and incorrect turns made by three individuals 

 of Physa gyrina Say, in their attempts to reach the surface of the water on the 

 Y apparatus. Error was punished by an electric shock. The warning stimulus 

 was roughness. The apparatus was cleaned between trials. 



No. of 

 days 

 tested 



1 



Totals. 



No. of 



trial 



for 



series 



Snail No. 



No. of 

 trial 

 for 

 day 



1 

 2 

 3 

 3 



No. of 

 correct 

 choices 



1 

 

 



1 (33%) 







No. of 



incorrect 



choices 





 1 

 1 



2 (66%) 



Totals . 



Totals . 



*5 



Totals . 



Totals . 



Totals . 



8 

 9 



10 

 11 

 12 



13 

 14 

 15 

 16 

 17 



18 

 19 

 20 

 21 



22 

 23 

 24 

 25 

 26 

 27 

 28 



29 

 30 

 31 

 32 

 33 

 34 



Totals. 



1 

 2 

 3 

 3 



1 



2 



2a 



2b 



3 



5 



1 



la 



2 



3 



3a 



5 



1 



la 

 2 

 3 



4 



1 



2 



2a 



2b 



3 



3a 



4 



7 



1 

 2 

 3 



3a 

 3b 



4 

 6 



1 

 1 



1 



3 (100%) 



1 

 

 

 

 

 1 (20%) 







1 





 







1 (20%) 







1 





 



1 (25%) 



(42%) 



1 

 

 

 



1 



1 



3 (50 f 



(80%) 



(80%) 



1 





 1 



1 



3 (75%) 





 1 

 1 







1 

 1 

 1 



4 



(57%) 



(50%) 



