The psychology of efficiency
Subtitle: an experimental study of the processes involved in the solution of mechanical puzzles and in the acquisition of skill in their manipulation
By: by Henry Alford Ruger ...
Series: Archives of psychology -- v. no. 15; Columbia University contributions to philosophy and psychology -- v. 19, no. 2; Archives of psychology -- no. 15
Publisher: The Science press
Published: 1910
Place of publication: New York
Language: eng
Number of pages: 88
Subjects: Ability; Puzzles
Notes: Vita.

Thesis (PH. D.) - Columbia university.