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Lamb, Michael E. – Developmental Psychology, 1976
Twenty 18-month-olds were observed interacting with their mothers and fathers in a structured laboratory setting. Assessed were affiliation and attachment behaviors when the infant was alone with either the mother or father or with both parents and when stranger entered. (Author/MS)
Descriptors: Affiliation Need, Attachment Behavior, Behavioral Science Research, Early Childhood Education

Valenzuela, Marta – Developmental Psychology, 1997
Used home observations and laboratory procedures with 85 Chilean mothers and infants to examine the association between infants' chronic undernutrition and maternal sensitivity, sociodemographic variables, and infants' play and problem solving. Found that maternal sensitivity was correlated with maternal education, maternal weight, marital…
Descriptors: Affective Behavior, Attachment Behavior, Context Effect, Developing Nations