The robustness of speech-like vocalization in typically developing infants and infants with autism

IF 2.9 2区医学 Q1 EDUCATION, SPECIAL

Research in Developmental Disabilities Pub Date : 2025-03-14 DOI:10.1016/j.ridd.2025.104949

D. Kimbrough Oller , Edina R. Bene , Hyunjoo Yoo , Pumpki Lei Su , Helen Long , Cheryl Klaiman , Stormi L. Pulver , Moira L. Pileggi , Natalie Brane , Gordon Ramsay

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引用次数: 0

Abstract

Background

Human infants produce speech-like vocalizations (“volubility”) at very high rates, 4-5 per minute during waking hours across the first year, far exceeding rates of our ape relatives.

Aims

We document volubility in 127 typically developing (TD) infants, 44 with autism (ASD), and 21 with non-autism developmental delay (DD) through longitudinal recordings and human coding.

Methods and Procedures

Families of 302 infants (110 not yet diagnosed or with other diagnoses) supplied 8.6 all-day recordings across the first year. Trained coders analyzed 21 randomly-selected 5-minute segments per recording, counting speech-like vocalizations, cries, and laughter.

Outcomes and Results

Infants in all groups (including those with other diagnoses or not yet diagnosed) showed volubility of 4-5 per minute for the first year, but boys showed higher volubility than girls in the TD, ASD, and DD groups. While volubility was relatively stable across the first year for both boy and girl TD infants, volubility fell in both ASD and DD boys, while being more stable for girls.

Conclusions and Implications

Strong similarities in volubility were seen across all groups, but male infants diagnosed with ASD or DD showed falling volubility across the first year, a pattern not seen in TD infants.

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来源期刊

Research in Developmental Disabilities Multiple-

CiteScore

5.50

自引率

6.50%

发文量

178

期刊介绍： Research In Developmental Disabilities is aimed at publishing original research of an interdisciplinary nature that has a direct bearing on the remediation of problems associated with developmental disabilities. Manuscripts will be solicited throughout the world. Articles will be primarily empirical studies, although an occasional position paper or review will be accepted. The aim of the journal will be to publish articles on all aspects of research with the developmentally disabled, with any methodologically sound approach being acceptable.