GROUP BEHAVIOR 



169 



in the larger aquarium-maze. In the other half, the 

 partition was of opaque glass, cutting off the view. 



O CLEAR GLASS 

 OPAQUE GLASS 



t 2 

 TRIAL 



Fig. 38. Goldfish react more rapidly if allowed to watch 



others perform. (From Welty.) 



Trained fish were placed in the aquarium-maze 



and were run through their performance from ten 



to twenty times in different experiments. The same 



