Academic Journal
Foveal crowding and segmentation effects in adults with ADHD.
| Τίτλος: | Foveal crowding and segmentation effects in adults with ADHD. |
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| Συγγραφείς: | Ifrah-Tsruya H; School of Optometry and Vision Science, Faculty of Life Sciences, Bar-Ilan University, Israel., Lev M; School of Optometry and Vision Science, Faculty of Life Sciences, Bar-Ilan University, Israel., Epstein T; School of Optometry and Vision Science, Faculty of Life Sciences, Bar-Ilan University, Israel., Polat U; School of Optometry and Vision Science, Faculty of Life Sciences, Bar-Ilan University, Israel. Electronic address: uri.polat@biu.ac.il. |
| Πηγή: | Vision research [Vision Res] 2026 Sep; Vol. 246, pp. 108862. Date of Electronic Publication: 2026 Jun 17. |
| Τύπος έκδοσης: | Journal Article |
| Γλώσσα: | English |
| Στοιχεία περιοδικού: | Publisher: Elsevier Science Ltd Country of Publication: England NLM ID: 0417402 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1878-5646 (Electronic) Linking ISSN: 00426989 NLM ISO Abbreviation: Vision Res Subsets: MEDLINE |
| Imprint Name(s): | Publication: Kidlington, Oxford : Elsevier Science Ltd. Original Publication: Oxford [etc.] |
| Ιατρικοί όροι (MeSH): | Attention Deficit Disorder with Hyperactivity*/physiopathology , Fovea Centralis*/physiology , Fovea Centralis*/physiopathology , Pattern Recognition, Visual*/physiology, Reaction Time/physiology ; Photic Stimulation/methods ; Attention/physiology ; Visual Fields/physiology ; Humans ; Adult ; Female ; Male ; Young Adult ; Analysis of Variance ; Cues |
| Περίληψη: | This study investigated foveal crowding and segmentation effects in adults with Attention- Deficit/Hyperactivity Disorder (ADHD) compared to neurotypical controls. While visual crowding, the impaired identification of targets surrounded by flanking elements, has been extensively studied in peripheral vision across various populations, its manifestation in central (foveal) vision among adults with ADHD remains insufficiently studied. 45 participants (22 ADHD, 23 controls) completed a computerized visual task involving identification of the direction of a central target letter ("E") under crowded and uncrowded conditions. A subset of 26 participants (14 ADHD, 12 controls) completed an additional segmentation condition in which the target appeared in red while flankers remained black. Accuracy and response times were recorded across varying stimulus durations (30-240 ms). Results indicated that adults with ADHD exhibited significantly stronger foveal crowding Effects and slower response times than controls. Segmentation improved performance in both groups. These findings suggest that perceptual alterations associated with ADHD extend to basic perceptual processes in central vision. The enhanced crowding reflects a reduced ability to filter irrelevant visual information and an increased integration field, which heightens interference between target and flanker signals and thus increases crowding susceptibility. Salient visual cues mitigated these effects by enhancing target distinctiveness. The findings have implications for everyday visual behaviors, including reading and driving in complex environments, where impaired filtering of distracting information may affect performance. (Copyright © 2026 The Authors. Published by Elsevier Ltd.. All rights reserved.) |
| Competing Interests: | Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. |
| Contributed Indexing: | Keywords: ADHD; Attention-deficit/hyperactivity disorder; Crowding; Foveal vision; Popout; Response time; Segmentation; Visual perception |
| Entry Date(s): | Date Created: 20260617 Date Completed: 20260722 Latest Revision: 20260722 |
| Update Code: | 20260723 |
| DOI: | 10.1016/j.visres.2026.108862 |
| PMID: | 42308563 |
| Βάση Δεδομένων: | MEDLINE |
| ISSN: | 1878-5646 |
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| DOI: | 10.1016/j.visres.2026.108862 |