REACTIONS OF CHICKS TO OPTICAL STIMULI 



I'S'.r 



TABLE 1 



Red-Blue Reactions 



Chicks hatched Oct. 26, 190S 



Series 



13 

 14 



Date 



No. 58 



Sex. F. 



Red Blue 



No. 61 

 Sex, M. 

 Red Blue 



No. 62 No. 65 



Sex. M. ' Sex, M. 



Red Blue Red Blue 



Remarks 



Preliminary Tests 



Nov. 2S 

 " 30 



Dec. 1 

 1 

 2 

 2 



Dec. 



1 9 



1 9 



1 9 



10 



3 7 



Preference Tests 



3 7 



3 7 



9 1 



10 



R, 70; B, 10. 

 R, 70; B, 10. 

 R, 40; B, 10. 

 R, 100; B, 10. 

 R, 40; B. 10. 

 R, 100; B, 10. 



Training Tests 



R, 70; B, 10. 

 R, 70; B, 10. 

 R, 70; B, 10. 

 R, 70; B, 10. 

 R, 70; B, 10. 

 R, 70; B, 10. 

 R, 70; B, 10. 

 R, 70; B, 10. 



Sk, 6 

 Sk, 6. 

 Sk, 6. 

 Sk, 6. 

 Sk. ti. 

 Sk, 6. 

 Sk, 6. 

 Sk, 6. 



Control Tests 



