A study of first mothers Rooming-in with their newborns in a Swedish hospital was completed by comparing fifty Rooming-in mothers with fifty Non-Rooming-in mothers. There was complete randomization in the selection procedure. Rooming-in mothers judged themselves to be more confident and competent in baby care, thought they would need less help in caring for their infants at home, and could attribute more to their babies' cries than the Non-Rooming-in mothers.
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Greenberg et al. (1973) studied this question.
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