Abstract
Tonal or melodic contours of maternal voice directed to infants play a role in infants’ self-regulation and vocal responsiveness. However, we are unaware about melodic contours of maternal humming directed to preterm infants and its role for infants’ vocal responsiveness. We aimed (1) to identify the melodic contours (sinusoidal, bell-shaped, U-shaped, rising, falling, and linear contours) of maternal humming directed to preterm infants in kangaroo care and (2) to identify preterm infants’ overlapping vocalizations in each humming melodic contour. Mothers (
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