A profile of prosodic speech differences in individuals with autism spectrum disorder and first-degree relatives.

This research looked at speech rhythm and stress patterns in autistic people and their parents. Both groups had difficulties with certain speech tasks compared to families without autism. Autistic individuals struggled with understanding stress in speech, while both autistic people and their parents had trouble producing proper speech stress and rhythm. These speech differences were linked to broader communication challenges in conversation.

The similarities between autistic individuals and their parents suggest these speech patterns may be inherited.

This study examined prosodic speech differences (intonation, stress patterns) in autistic individuals and their parents using the PEPS-C assessment and acoustic analyses. Results showed that autistic individuals had receptive prosody deficits in contrastive stress, while both autistic individuals and their parents demonstrated reduced accuracy in expressive prosody tasks including imitation, lexical stress, and contrastive stress compared to controls. No acoustic differences were detected despite performance differences. The study found relationships between prosodic difficulties and pragmatic language violations in conversation.

These overlapping prosodic patterns between autistic individuals and their parents suggest genetic influences on prosodic abilities, supporting prosody as part of the broader autism phenotype.

Findings suggest prosodic assessment should be included in autism evaluations, particularly for contrastive stress abilities. Family-based interventions targeting prosodic skills may be beneficial given similar patterns in parents. Prosodic training could potentially improve broader pragmatic communication abilities in autistic individuals.

Sample size not reported, limiting assessment of statistical power. Study type unspecified, affecting interpretation of methodology rigor. Acoustic analyses did not detect differences despite performance variations, suggesting measurement sensitivity issues. Cross-sectional design prevents determination of causality between prosodic differences and pragmatic language outcomes.

Impairments in prosody (e.g., intonation, stress) are among the most notable communication characteristics of individuals with autism spectrum disorder (ASD) and can significantly impact communicative interactions. Evidence suggests that differences in prosody may be evident among first-degree relatives of autistic individuals, indicating that genetic liability to ASD is expressed through prosodic variation, along with subclinical traits referred to as the broad autism phenotype (BAP). This study aimed to further characterize prosodic profiles associated with ASD and the BAP to better understand the clinical and etiologic significance of prosodic differences. Autistic individuals, their parents, and respective control groups completed the Profiling Elements of Prosody in Speech-Communication (PEPS-C), an assessment of receptive and expressive prosody.

Responses to expressive subtests were further examined using acoustic analyses. Relationships between PEPS-C performance, acoustic measurements, and pragmatic language ability in conversation were assessed to understand how differences in prosody might contribute to broader ASD-related pragmatic profiles. In ASD, receptive prosody deficits were observed in contrastive stress. With regard to expressive prosody, both the ASD and ASD Parent groups exhibited reduced accuracy in imitation, lexical stress, and contrastive stress expression compared to respective control groups, though no acoustic differences were noted.

In ASD and Control groups, lower accuracy across several PEPS-C subtests and acoustic measurements related to increased pragmatic language violations. In parents, acoustic measurements were tied to broader pragmatic language and personality traits of the BAP. Overlapping areas of expressive prosody differences were identified in ASD and parents, providing evidence that prosody is an important language-related ability that may be impacted by genetic risk of ASD.