Media type: E-Article Title: Playing Peekaboo with a Four-Month-Old: A Study of the Role of Speech and Nonspeech Sounds in the Formation of a Visual Schema Contributor: Greenfield, Patricia M. imprint: Informa UK Limited, 1972 Published in: The Journal of Psychology Language: English DOI: 10.1080/00223980.1972.9923819 ISSN: 1940-1019; 0022-3980 Keywords: General Psychology ; Education ; Business, Management and Accounting (miscellaneous) Origination: Footnote: