108 



HAROLD C. BINGHAM 



tion. These tests are reported in table 7 as series 24 and 25. 

 The test sheets show how utterly confusing to the chick was 

 this condition. The results of this test were verified in the 

 series recorded in table 8 under date of* March 28 where the 

 record is the same and the behavior was very similar. 



Finally this chick's response to the circle-triangle was tested. 

 The reversion of the condition for discrimination was at first 

 confusing to the chick, and much patience on the part of the 

 experimenter was necessary. The plan now was to begin with 



TEST SHEET 



Title of investigation, Form: A 28+ — O 63+ 

 Experimented on, 21 



Harvard Psychological Laboratory, March 18, 1912 

 Record Sheet, 2; Series, 25 



6-4-84.6 



o 63+ — a 28+ and gradually to eliminate the size difference by 

 substituting successively smaller circles. In this case the right 

 stimulus area was the variable and the standard was the sign 

 of "shock" and "no escape." From the tabulation of these 

 results the early records are omitted since these tests were only 



