Evaluation of the Visuo-attention Field of Symbols Versus Objects Visual Search in Dyslexic Subjects. DyslexiaSPOTLIGHT
Overview
- Phase
- Not Applicable
- Intervention
- Not specified
- Conditions
- Dyslexia
- Sponsor
- Hospices Civils de Lyon
- Enrollment
- 1460
- Locations
- 1
- Primary Endpoint
- Respond time in visual search in different condition of view (full view or reduced view) with separable feature.
- Status
- Active, not recruiting
- Last Updated
- 2 years ago
Overview
Brief Summary
dyslexia is often considered like a phonological deficit but some researches show that a visual attention (V-A) deficit can occur in dyslexia. The investigator want to show that some dyslexics have a reduced V-A field in visual search when the investigator use separable feature (letter-like).
If the investigator demonstrate that, he will show that V-A deficit can be transpose to an ability acquired before reading, the visual search. Therefore, the V-A deficit can't be a consequence of reading problem but a cause of it for some dyslexics.
The investigator could imagine an earlier diagnosis for children at risk to develop dyslexia and make reeducation more specific for the deficit observed.
Investigators
Eligibility Criteria
Inclusion Criteria
- •normal or corrected to normal vision
- •diagnosed dyslexics with a recent "alouette" test
Exclusion Criteria
- •other developmental problem (dysphasia, dyspraxia, ADHD)
- •strabismus, amblyopia, oculomotor paralysis
Outcomes
Primary Outcomes
Respond time in visual search in different condition of view (full view or reduced view) with separable feature.
Time Frame: Day 0
The subject will have to find a target among distractors, when he will find it, he will have to push a button and we will have his respond time. We will compare the respond time in two view condition: the participant will see all the visual scene or he will have reduced visible window so he won't see all the scene, the periphery will be hide and he will have to move his sight to show it.
Secondary Outcomes
- respond time in function of the distractors' number(Day 0)
- visual attention span (VAS)(Day 0)
- visual exploration of the scene(Day 0)
- visuo-spatial perception(Day 0)