Selection and Test of Response Measures in the Study of the Human Newborn

Abstract
An initial attack on the problems of newborn behavior was made in an examination of the reliability, individual stability, and related-ness of 4 response measures, movement, crying, mouthing, and hand-mouth contacting. Infants were seen repeatedly during the lying-in period. All measures showed very high intersubjective reliability. The measures for movement and hand-mouth contacting were sensitive to individual variation over the first 5 days of life; the measures for crying and mouthing were not. The movement measure showed systematic change over the lying-in period; for the other measures, neither a regular increase nor a regular decrease in occurrence was found, putting in some doubt the suggestion that mouthing and hand-mouth contacting are phenomena secondary to feeding. The relation of the findings to the problem of tension and tension-control in the newborn was discussed.

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