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Studied separation and greeting responses in a longitudinal study of 26 15-54 wk old infants observed at home. Both onset and relative frequency of each separation behavior were plotted at 3-wk intervals. Separation protest was differential to the mother from its onset, whereas following was not. Most positive greeting behaviors were differential, but smiling was not. Infants when left totally alone were more likely to exhibit separation-related behaviors than when left with companions. Findings are discussed in the context of an ethological-evolutionary model of social development. (27 ref.)
Developmental Psychology – American Psychological Association
Published: Sep 1, 1973
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