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(1967). Journal of Nervous and Mental Disease. CXXXIX, 1964: The Smiling Response. II. Visual Discrimination and the Onset of Depth Perception. Paul R. Polak; Robert N. Emde; and René A. Spitz. Pp. 407-415.. Psychoanal Q., 36:140.
Psychoanalytic Electronic Publishing: Journal of Nervous and Mental Disease. CXXXIX, 1964: The Smiling Response. II. Visual Discrimination and the Onset of Depth Perception. Paul R. Polak; Robert N. Emde; and René A. Spitz. Pp. 407-415.

(1967). Psychoanalytic Quarterly, 36:140

Journal of Nervous and Mental Disease. CXXXIX, 1964: The Smiling Response. II. Visual Discrimination and the Onset of Depth Perception. Paul R. Polak; Robert N. Emde; and René A. Spitz. Pp. 407-415.

The beginning of depth perception in infants was found to be between two months and twenty days and three months. Two-dimensional models of faces proved to be poor elicitors of the smiling response, particularly in babies older than three and one-half months, whereas three-dimensional models were more effective. A method of using the smiling response in order to investigate the development of visual discrimination and depth perception is described.

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Article Citation

(1967). Journal of Nervous and Mental Disease. CXXXIX, 1964. Psychoanal. Q., 36:140

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