SLPOtherJournal of autism and developmental disorders2020

Understanding Social Communication Differences in Autism Spectrum Disorder and First-Degree Relatives: A Study of Looking and Speaking.

Michelle Lee, Kritika Nayar, Nell Maltman and 4 others

PMID 30864059

WHAT IT FOUND

Narrative quality was similar to controls in a structured picture-book task but lower in both individuals with ASD and their parents during an unstructured, emotionally ambiguous storytelling task.

Gaze differences were subtle and inconsistent.

Key findings

01Individuals with ASD and parents of individuals with ASD produced lower quality narratives than controls in the unstructured, emotionally evocative TAT task, but not in the structured wordless picture book task.

02Visual attention differences were subtle: the ASD group showed reduced fixations to setting elements in the structured task, while gaze differences in the unstructured task varied by image and were not consistently significant after correcting for multiple comparisons.

03No significant associations were found between gaze patterns and narrative quality in the structured task for individuals with ASD, though some correlations appeared in the unstructured task and for parents.

STILL TO COME

How it was doneWhat they foundWhat it means for SLPs

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What it does not show

A substantial number of participants were excluded from the eye-tracking analyses due to data quality issues (e.g., 27% of the ASD group in the picture book task), which may bias the gaze results. The study used a global computational measure of narrative quality (LSA), which may not capture specific pragmatic or social-cognitive aspects of narrative, such as character motivation or mental state references. The gaze findings were largely exploratory and did not survive correction for multiple comparisons in the unstructured task, limiting confidence in the relationship between visual attention and narrative performance. The sample of parents was large, but the number of intact parent-child dyads available for familial correlation analysis was smaller (49 dyads), limiting power for those specific analyses.

Declared interests

Funded by the National Institutes of Health. No conflicts of interest declared.

The easy way to misread this

Do not conclude that gaze patterns directly cause narrative deficits in ASD. The associations between eye-tracking data and narrative quality were inconsistent, often non-significant after statistical correction, and the study design cannot establish causality. The primary robust finding is the context-dependent nature of narrative performance, not the mechanism via visual attention.

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