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Crowded visual search in children with normal vision and children with visual impairment
- Source :
- Vision Research, 96, 65-74, Vision Research, 96, pp. 65-74, Vision Research, 96, 65-74. PERGAMON-ELSEVIER SCIENCE LTD
- Publication Year :
- 2014
-
Abstract
- Contains fulltext : 123733.pdf (Publisher’s version ) (Open Access) This study investigates the influence of oculomotor control, crowding, and attentional factors on visual search in children with normal vision ([NV], n = 11), children with visual impairment without nystagmus ([VI−nys], n = 11), and children with VI with accompanying nystagmus ([VI+nys], n = 26). Exclusion criteria for children with VI were: multiple impairments and visual acuity poorer than 20/400 or better than 20/50. Three search conditions were presented: a row with homogeneous distractors, a matrix with homogeneous distractors, and a matrix with heterogeneous distractors. Element spacing was manipulated in 5 steps from 2 to 32 minutes of arc. Symbols were sized 2 times the threshold acuity to guarantee visibility for the VI groups. During simple row and matrix search with homogeneous distractors children in the VI+nys group were less accurate than children with NV at smaller spacings. Group differences were even more pronounced during matrix search with heterogeneous distractors. Search times were longer in children with VI compared to children with NV. The more extended impairments during serial search reveal greater dependence on oculomotor control during serial compared to parallel search. 10 p.
- Subjects :
- Male
medicine.medical_specialty
Visual acuity
Eye Movements
Visual impairment
Vision Disorders
Visual Acuity
Other Research Donders Center for Medical Neuroscience [Radboudumc 0]
Nystagmus
Audiology
Development
Social Development
Developmental psychology
OBJECT RECOGNITION
AMBLYOPIA
medicine
Humans
Attention
Child
Children
ACUITY
Visual search
Analysis of Variance
CONGENITAL NYSTAGMUS
FEATURE-INTEGRATION
Eye movement
INFANTILE NYSTAGMUS
PERFORMANCE
Disorders of movement Donders Center for Medical Neuroscience [Radboudumc 3]
Crowding
Sensory Systems
Ophthalmology
Oculomotor control
Case-Control Studies
Sensory Thresholds
Female
medicine.symptom
Normal vision
EYE-MOVEMENTS
Psychology
CONTOUR INTERACTION
Nystagmus, Congenital
READING STRATEGIES
Photic Stimulation
Subjects
Details
- ISSN :
- 00426989
- Database :
- OpenAIRE
- Journal :
- Vision Research, 96, 65-74, Vision Research, 96, pp. 65-74, Vision Research, 96, 65-74. PERGAMON-ELSEVIER SCIENCE LTD
- Accession number :
- edsair.doi.dedup.....44d05e2d5d40dbae88fa063ec7d99712