Nature and Development of Affection. A series of observations and experiments analysing the variables underlying the nature and development of affection in primates. Rhesus monkeys, separated from their mothers at birth, were raised mursing or non-nursing on cloth or wire surrogate mothers. Shoes infants being tested for mother preference under a variety of conditions. Results indicate that contact comfort is the primary variable determining affection and attachmentof the rhesus to the mother. Infant moneys develop strong and persisting affectional attachments to the coloth "mother" and behave in a secure manner in her presence. H.F. Harlow and R. Zimmerman. Primate category
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