Yoakum, Behavior of Squirrels. 



S^S 



Position was ruled out by reversing the direction of the turn 

 the animal must make to enter the proper box. Our experience in 

 this part of the control is quite similar to Professor Yerkes' descrip- 

 tion.^^ 



TABLE VI. 

 Tests on Temperature Discrimination of White Rats. 



It was found impossible to eliminate the position factor to the 

 point where it became non-operative. This failure to rule out posi- 

 tion was used in the latter part of the series as a semi-control test. 

 Going twice or three times into the box in one position was sufficient 

 to establish a preference in favor of that side. Changing the right- 

 left relation of the boxes at this stage constituted a severe test, both of 

 the temperature association and of the squirrel's patience. !No 

 failures to choose correctly between the boxes are recorded at the 

 stage where this test was tried. 



'=Tlie Dancing Mouse, The Macmillan Co., '07, p. 91 ff. 



