

Memoirs National Academy of Sciences XV 



Part I, PI. 1£ 



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MATERIALS FOR THE PERFORMANCE SCALE, PICTURE ARRANGEMENT TEST (TEST 9), SHOWING THE DEMONSTRATION AL SERIES X 

 AND THE FOUR TRIAL SERIES A, B, C, D, ALL ARRANGED IN CORRECT ORDER. 



The series were presented to the subject out of order; see directions for test 9, page 1 89. 



