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1
Predictive processing during a naturalistic statistical learning task in ASD
Lajiness-O’neill, Renee
;
Brennan, Jonathan R.
;
Ugolini, Margaret
;
Hay, Jessica S.F.
;
Kovelman, Ioulia
;
Wagley, Neelima
;
Bowyer, Susan M.
In: Faculty Scholarship 2020 (2020)
Abstract:
© 2020 Wagley et al. Children’s sensitivity to regularities within the linguistic stream, such as the likelihood that syllables co-occur, is foundational to speech segmentation and language acquisition. Yet, little is known about the neurocognitive mechanisms underlying speech segmentation in typical development and in neurodevelopmental disorders that impact language acquisition such as autism spectrum disorder (ASD). Here, we investigate the neural signals of statistical learning in 15 human participants (children ages 8–12) with a clinical diagnosis of ASD and 14 age-matched and gender-matched typically developing peers. We tracked the evoked neural responses to syllable sequences in a naturalistic statistical learning corpus using magnetoencephalography (MEG) in the left primary auditory cortex, posterior superior temporal gyrus (pSTG), and inferior frontal gyrus (IFG), across three repetitions of the passage. In typically developing children, we observed a neural index of learning in all three regions of interest (ROIs), measured by the change in evoked response amplitude as a function of syllable surprisal across passage repetitions. As surprisal increased, the amplitude of the neural response increased; this sensitivity emerged after repeated exposure to the corpus. Children with ASD did not show this pattern of learning in all three regions. We discuss two possible hypotheses related to children’s sensitivity to bottom-up sensory deficits and difficulty with top-down incremental processing.
URL:
https://doi.org/10.1523/ENEURO.0069-19.2020
https://commons.emich.edu/fac_sch2020/149
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Predictive Processing during a Naturalistic Statistical Learning Task in ASD
Wagley, Neelima
;
Lajiness-O’Neill, Renee
;
Hay, Jessica S. F.
...
In: eNeuro (2020)
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