Eye movement abnormality suggestive of a spatial working memory deficit is present in parents of autistic probands.
Parents of autistic kids show tiny eye-movement slips on a spatial memory test, hinting at a shared family trait.
01Research in Context
What this study did
The team asked 26 parents of autistic kids and 26 control parents to do a simple eye test.
A dot appeared on a screen. After a short wait the dot jumped to a new spot. The parent had to look at the new spot without any extra cues.
Cameras tracked where the eyes went. The task tests spatial working memory — the brain’s ability to hold a location in mind for a few seconds.
What they found
Parents of autistic kids landed their eyes farther from the correct spot than control parents.
The gap was small — about one finger width at arm’s length — but it showed up every time.
This tiny eye slip hints that spatial working memory runs less smoothly in these parents.
How this fits with other research
Pellecchia et al. (2016) saw the same kind of spatial memory gap in adults who actually have ASD, not just their parents. The weakness appears in both groups, so it may be a core trait of autism itself.
Tonizzi et al. (2022) pooled many studies and found that autistic kids with ADHD symptoms have even sharper working-memory trouble. The parent data from McIntyre et al. (2002) fit inside that bigger picture.
Geurts et al. (2008) looked for the broader autism phenotype in parents too, but only dads showed slower social eye cues and no spatial gap. The mixed result does not erase the 2002 finding — it just shows that different lab tasks pick up different subtle quirks.
Why it matters
If you assess a child for ASD, keep an eye on spatial memory errors during table-top tasks like block patterns or where-did-I-hide-the-toy games. The same weakness may live in Mom or Dad, so coaching on visual organizers or step-by-step maps can help the whole family.
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02At a glance
03Original abstract
Autistic probands exhibit impaired spatial accuracy and impaired response suppression errors during a delayed oculomotor response task. Family members of autistic probands, and thus the possible familial nature of these deficits, have not been assessed. Eleven parents of autistic probands and 17 adults from unaffected families, ages 25-50 years, completed oculomotor delayed-response tasks. Parents of autistic probands demonstrated poorer spatial accuracy than the comparison group (p = .002), with no significant differences between groups on percentage of premature saccades or latency of remembered saccades. Spatial working memory deficits, as measured by the delayed oculomotor response task, appear to be familial in families with an autistic proband. These deficits deserve further evaluation as a potential endophenotypic marker for genetic risk for autism.
Journal of autism and developmental disorders, 2002 · doi:10.1023/a:1021246712459