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50 Years of ERIC
50 Years of ERIC
The Education Resources Information Center (ERIC) is celebrating its 50th Birthday! First opened on May 15th, 1964 ERIC continues the long tradition of ongoing innovation and enhancement.

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Peer reviewed Peer reviewed
ERIC Number: EJ214825
Record Type: CIJE
Publication Date: 1978-May
Pages: N/A
Abstractor: N/A
Reference Count: 0
ISBN: N/A
ISSN: N/A
Smiling and Laughter in Infants as a Function of Level of Arousal and Cognitive Evaluation.
Macdonald, Nancy E.; Silverman, Irwin W.
Developmental Psychology, v14 n3 p235-41 May 1978
Descriptors: Arousal Patterns, Emotional Response, Infant Behavior, Infants, Models, Stranger Reactions
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers: N/A