The world as we know it and the world as it is: Eye-movement patterns reveal decreased use of prior knowledge in individuals with autism.
Autistic adults show looser, slower eye patterns when learning what an ambiguous picture is, pointing to weak top-down visual guidance.
01Research in Context
What this study did
Król et al. (2019) watched where autistic and typical adults looked while they tried to make sense of fuzzy black-and-white pictures called Mooney images.
These pictures look like random blobs until your brain "sees" the hidden object. The team tracked eye movements to learn how fast each group locked onto the answer.
What they found
Autistic viewers changed their scan paths less from trial to trial. Their eyes wandered more and they took longer to settle on a guess.
The data say they lean less on past experience to guide their eyes, so each picture feels new even after hints.
How this fits with other research
Sapey-Triomphe et al. (2021) extends the story: autistic adults can form expectations but don't tweak them when the rules shift. The 2019 study shows the first step—weak expectations—while the 2021 study shows the next—rigid expectations.
Binur et al. (2022) conceptually replicate the finding with a different task. They mixed reliable and unreliable cues and still saw autistic participants under-weight prior knowledge, matching the slower learning Magdalena saw.
Vanmarcke et al. (2016) used real-life photos instead of Mooney blobs and found the same pattern: fewer people fixations and missed gist. Different pictures, same reduced top-down guidance.
Why it matters
If your client scans a scene but never "gets" the point, extra verbal cues or highlighted boundaries can stand in for missing prior knowledge. Preview the goal before the task and keep prompts consistent across trials. These small supports can steady the visual search and speed learning.
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02At a glance
03Original abstract
We used a perceptual closure task with Mooney images as stimuli to record eye-movement patterns in response to the same degraded image before and after perceptual learning in 21 adolescents and young adults with ASD and 23 sex-, age-, and IQ-matched typically developing individuals. In the control group, we observed changes in the eye-movement patterns between the first and the last presentation of the degraded stimulus, reflecting top-down optimization of eye-movement patterns, that is, a decrease in the number of fixations and interfixation distance, coupled with an increase in the duration of fixations. This effect was attenuated in individuals with autism, pointing to a decreased rate of perceptual learning. We also found that participants with autism displayed decreased scanpath stability, that is, a lower recurrence of fixation locations between different presentations of the same image, which may suggests a lower rate of perceptual learning or decreased predictability in the eye-movement patterns. These results provide evidence for decreased use of prior knowledge in perceptual decisions in autism. Autism Res 2019, 12: 1386-1398. © 2019 International Society for Autism Research, Wiley Periodicals, Inc. LAY SUMMARY: We showed autistic and typically developing participants some degraded images that were difficult to recognize for the first time, but once you knew what they represent, you could see it easily. We found that the eye-movement patterns of persons with autism did not change as much after learning what the pictures represented as in the case of typically developing participants. This means that previous experiences and knowledge change the way people with autism perceive things to a smaller extent.
Autism research : official journal of the International Society for Autism Research, 2019 · doi:10.1002/aur.2133