Held at Indiana University, April 13, 1938. [The Value of the Dictaphone in Diagnosing Difficulties in Addition. Merrill T. Eaton. The Measurement Program in a City School System. Relationship Between a Measurement Program and a Guidance Program. George Melcher. The Nature of and Factors in Ability in the Light of Recent Evidence. Intellectual Growth Based on Longetudinal Studies. Frank N. Freeman.].