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The mother's tie to her child.

Several years ago John Bowlby wrote a paper entitled "The Nature of the Child's Tie to His Mother."1 This and the growing literature on "imprinting" pioneered by the ethologists have focused attention on the significances of early experiences for the development of the young organism-human and nonhuman.
 The nature of "the mother's tie to the child" has not received as much attention. Therefore, it is heartening to note an early report of a study, "Neonatal Separation: The Maternal Side of Interactional Deprivation," in this issue.2 Maternal behavior has been explored thus far mainly in animal studies. Some years ago we demonstrated that brief separation of newborn goats from their mothers resulted in a significant interference with the specificity of the mother's affection for her young.3