Thresholds for the perception of difference in facial expression and its elements.
By: [by] Francis W. Irwin.
Published: 1932
Place of publication: Philadelphia
Language: eng
Number of pages: 17
Subjects: Physiognomy.; Perception.
Other titles: Facial expression.
Notes: Thesis (Ph. D.)--University of Pennsylvania, 1932.
"Reprint from the American journal of psychology, vol. XLIV, no. 1."