20 G. V. HAMILTON 



TABLE 2 — Continued 



Subject Age Number of each Reaction-Type 



Gopher 1 Adult ... .A. 2 



B. 



C. 2 



D.O 



E. 



53 



Gopher 2 Adult. . . .A. — 3 



B. — 1 



C. — 1 



D. 6 



E. 



45 



Gopher 3 Adult. . . .A. 4 



B. 2 



C. 3 



D. 10 



E. 



34 



Gopher 4 Adult A. 4 



B. — 1 

 C.— 1 

 D. 2 



E. 



51 



Gopher 5 Adult. . . .A. 6 



B. 2 



CO 



D. 4 



E. 



46 



Gopher 6 Adult A. 2. This subject had onlv 80 trials. 



B. — 1 



CO 



D. 2 



E. 



37 



III 



Discussion of Tabic 2. — This table discloses the fact that 

 marked individual differences are elicited by the quadruple 

 choice method. The behaviorist who is accustomed to methods 

 which favor habit formation is apt to encounter such differences 

 only during the first few trials with animals for whom the ex- 



