Detection without further processing or processing without automatic detection? Differential ERP responses to lexical-semantic processing in toddlers at high clinical risk for autism and language disorder
نویسندگان
چکیده
Delays in early expressive vocabulary can reflect a specific delay language acquisition or more general impairments social communication. The neural mechanisms underlying the (dis)ability to establish first lexical–semantic representations remain relatively unknown. Here, we investigate electrophysiological underpinnings of these during critical phase lexical two groups 19-month-old toddlers at risk for neurodevelopmental disorders, i.e., children characterized by low (late talkers, N = 18) and with signs Autism Spectrum Disorder (ASD, as compared typically developing (N 28), aim identify similarities specificities lexical-semantic processing between groups. ERPs elicited words (either congruous incongruous previous picture context) pseudo-words are investigated within picture-word matching paradigm. In order further interpret ERP responses, look longitudinal intra-group associations socio-communications skills age 24 months. As expected, found differences that might underlie specificities, but also similarities. On one side, late talkers differed from other component (phonological-lexical priming effect) reflecting detection correspondence heard word representation pre-activated picture. symptoms ASD positive component) effortful semantic re-analysis following violation. functional interpretation components is corroborated significant correlations suggesting associated later socio-communication skills, whereas linguistic skills. Results point direction differential impaired populations, automatic incongruencies vs. absence high-level such ASD.
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ژورنال
عنوان ژورنال: Cortex
سال: 2021
ISSN: ['1973-8102', '0010-9452']
DOI: https://doi.org/10.1016/j.cortex.2021.04.020