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Accommodation in mean f0 during mother–infant and father–infant vocal interactions: a longitudinal case study

Published online by Cambridge University Press:  01 October 1997

GERALD W. McROBERTS
Affiliation:
University of Connecticut and Haskins Laboratories
CATHERINE T. BEST
Affiliation:
Wesleyan University and Haskins Laboratories

Abstract

Reports that infants imitate the vocal pitch characteristics of adult caregivers (e.g. Lewis, 1936/1951) include Lieberman's (1967; Lieberman, Ryalls & Rabson, 1982) claim that infants differentially adjust their vocal pitch or fundamental frequency (f0) towards that of their caregivers, resulting in higher mean pitch when interacting with mothers than when interacting with fathers. However, a recent cross-sectional study of infants at ages 0;8 to 0;9 and 1;0 failed to find evidence of differential pitch adjustment toward male and female caregivers (Siegel, Cooper, Morgan & Brennesie-Sarshad, 1990). A more sensitive test of Lieberman's claims would be to use a longitudinal design, with spontaneous recording sessions repeated over many months. The current study presents data from a longitudinal case study of an infant recorded at ages 0;3, 0;7, 0;10, 1;3 and 1;5 interacting with each of her parents in spontaneous play sessions and in isolated play. The infant in our study did not demonstrate significant adjustment of her vocal pitch in the direction of either parent. However, we did find evidence for consistent adjustment by the parents, in accord with the literature on infant-directed speech and mother–infant dyadic interactions, which suggest that the parents adjusted their behaviour to suit the infant more than vice versa.

Type
Research Article
Copyright
1997 Cambridge University Press

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Footnotes

A subset of these data were presented in a preliminary report at the International Conference on Infant Studies (Best & McRoberts, 1988). The research was supported by NIH grants HD-01994 to Haskins Laboratories and DC-00403 to the second author. We thank Debra Wilkenfeld, Eliza Goodell and Sandra Chiang for help with acoustic analyses.