Latham_et_al_2013.pdf (239.71 kB)
Spatial localisation in autism: evidence for differences in early cortical visual processing
journal contribution
posted on 2023-07-26, 13:07 authored by Keziah Latham, Susana T. L. Chung, Peter M. Allen, Teresa Tavassoli, Simon Baron-CohenBackground:
Vision in people with autism spectrum conditions (ASC) is reported to be different from people without ASC, but the neural level at which the differences begin to occur is not yet known. Here we examine two variants of a vernier acuity task to determine if differences are evident in early visual processing.
Findings:
Abutting and separated vernier acuity was assessed in 16 people with ASC and 14 matched controls. In controls, abutting and separated thresholds were unrelated (r = 0.13, p = 0.65), suggesting thresholds are determined by two separate mechanisms. In contrast, the abutting and separated thresholds of ASC observers were strongly correlated (r = 0.88, p < 0.0001), with separated thresholds tending towards being superior to those of controls [t(28) = −2.46, p = 0.02].
Conclusions:
The findings suggest the mechanisms employed by ASC observers in separated vernier tasks are different to those of controls. This psychophysical evidence suggests that visual differences in ASC may begin at an early cortical stage of visual processing.
History
Refereed
- Yes
Volume
4Issue number
4Publication title
Molecular AutismISSN
2040-2392External DOI
Publisher
BioMed CentralFile version
- Published version
Language
- eng
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Legacy posted date
2013-05-28Legacy creation date
2018-11-01Legacy Faculty/School/Department
ARCHIVED Faculty of Science & Technology (until September 2018)Usage metrics
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