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 A. Ruger.
Series: Archives of psychology; Teachers College educational reprints, no.5; Teachers College educational reprints -- no. 5.
Publisher: Teachers College, Columbia University
Published: 1926
Place of publication: New York
Language: eng
Number of pages: 88
Subjects: Ability.; Puzzles.