Lexical and affective prosody in children with high-functioning autism

Area of Science:

• Linguistics
• Developmental Psychology
• Neuroscience

Background:

• Autism Spectrum Disorder (ASD) is a neurodevelopmental condition characterized by social communication deficits.
• Prosody, including lexical stress and affective tone, plays a crucial role in spoken language comprehension and production.
• Understanding prosodic processing in adolescents with high-functioning autism (HFA) is vital for targeted interventions.

Purpose of the Study:

• To investigate the perception and production of lexical stress in adolescents with HFA.
• To examine the processing of affective prosody in adolescents with HFA.
• To compare prosodic abilities between adolescents with HFA and typically developing (TD) peers.

Main Methods:

• Three experiments were conducted with 16 adolescents with HFA and 15 TD peers.
• Experiment 1 assessed affective prosody perception using filtered sentences.
• Experiments 2 and 3 evaluated lexical stress perception and production, respectively, using acoustic analysis.

Main Results:

• No significant group differences were found in the accuracy of affective prosody or lexical stress perception.
• Adolescents with HFA accurately differentiated lexical stress patterns during production.
• However, their prosody productions were atypically prolonged, suggesting reduced naturalness.

Conclusions:

• Adolescents with HFA exhibit comparable receptive skills in prosody to TD peers.
• Despite accurate lexical stress differentiation, prosody production in HFA is characterized by prolonged utterances.
• Further research with larger samples and spontaneous speech is recommended to explore these findings.