The effect of practice upon individual differences
By: by Ruth Eastwood Perl ...
Series: Archives of psychology -- no. 159
Published: 1933
Place of publication: New York
Language: eng
Number of pages: 54
Subjects: Aptitude; Individuality; Psychophysiology; Ability
Other titles: Practice, The effect of.; Individual differences, The effect of practice upon.
Notes: Issued also as thesis (PH. D.) Columbia university.

Bibliography: p. 49-51.