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EMPIRICAL STUDIES IN THE 

 THEORY OF MEASUREMENT 



BY 



EDWARD L. THOKNDIKE, 



Professor of Educational Psychology in Teachers College, Columbia University. 



ARCHIVES OF PSYCHOLOGY 

 EDITED BY R. S. WOODWORTH 



No. 3, APRIL, 19O7 



Columbia University Contributions to Philosophy and PsychologyrVol. XV. No. 3 



ORK 

 THE SCIENCE 



