A DEFINITION OF FORM 141 



fluence. If, with all possible disturbing factors properly con- 

 trolled, this test of shifting fail, form perception in the strict 

 sense of that term can scarcely be said to prevail. 



I have shown that the discrimination of patterns was impossible 

 in my study. There was a possibility of discrimination on the 

 basis of two other factors. One of the remaining factors was form : 

 the other has been arbitrarily termed shape. The inverted 

 triangle possessed a different shape but an identical form as com- 

 pared with the upright triangle. The high percentage of correct- 

 ness in reactions changed to a relatively low percentage with 

 the inversion of the triangle. Obviously, then, form was not the 

 basis of choice. 



