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Acoustic Interactions: Pitch Coordination During Parent-Infant Interaction, Valerie Frances Mcdaniel
Acoustic Interactions: Pitch Coordination During Parent-Infant Interaction, Valerie Frances Mcdaniel
Electronic Theses and Dissertations
This dissertation investigates the development of pitch coordination between infants and mothers during the first year. The study contributes a longitudinal aspect to the small literature on this topic and introduces a new approach to understanding parent-infant interaction through the use of fine-grained acoustic analysis. Focusing exclusively on mutually-coordinated segments of interaction, acoustic measures examined pitch matching and other harmonic relationships between temporally contiguous utterances of the primary caregiver and infant. Fundamental frequency (fo) measurements were taken at turn exchanges, both at response boundaries and within overlapping vocalizations. Data was collected from 12 mother-infant dyads across two ages 3 months …
Endogenous And Social Factors Influencing Infant Vocalizations As Fitness Signals, Helen L. Long
Endogenous And Social Factors Influencing Infant Vocalizations As Fitness Signals, Helen L. Long
Electronic Theses and Dissertations
This dissertation evaluated the role of social and endogenous prelinguistic vocalizations as fitness signals in human development. It consists of three studies. The first investigated the reliability of listener judgments of the degree of infant vocal imitativeness in parent-infant vocal turn pairs as a measure of the saliency of potential vocal fitness signals. Participating listeners demonstrated moderate to high intra- and inter-rater agreement, suggesting vocal imitation has the potential to be used as a signal of fitness to caregivers in early development. The work also showed that vocal imitation in infancy is rare. The second study quantified the extent to …