The contribution of practice differences to group variability
By: by Mildred Eckhardt Hamilton ...
Series: Archives of psychology -- no. 278; Archives of psychology -- no. 278.
Published: 1943
Place of publication: New York
Language: eng
Number of pages: 40
Subjects: Difference (Psychology); Ability; Testing; Psychology of Learning
Other titles: Group variability
Notes: Issued also as thesis (PH. D.) Columbia university.

"References": p. 40.