Evaluation of the Visuo-attention Field of Symbols Versus Objects Visual Search in Dyslexic Subjects. DyslexiaSPOTLIGHT
试验速览
- 阶段
- 不适用
- 状态
- 进行中（未招募）
- 入组人数
- 1,460
- 试验地点
- 2
- 主要终点
- Respond time in visual search in different condition of view (full view or reduced view) with separable feature.
研究概览
简要总结
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.
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Parallel
- 主要目的
- Other
- 盲法
- None
入排标准
- 年龄范围
- 3 Years 至 12 Years（Child）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •normal or corrected to normal vision
- •diagnosed dyslexics with a recent "alouette" test
排除标准
- •other developmental problem (dysphasia, dyspraxia, ADHD)
- •strabismus, amblyopia, oculomotor paralysis
研究组 & 干预措施
Dyslexics with reduced visual attention span
21 subjects diagnosed dyslexics with reduced visual attention span
干预措施: Passing tests in dyslexics with reduced eva (Other)
Dyslexics with normal visual attention span
干预措施: Passing tests in dyslexics with reduced eva (Other)
controls
干预措施: Passing tests in controls (Other)
结局指标
主要结局
Respond time in visual search in different condition of view (full view or reduced view) with separable feature.
时间窗: 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.
次要结局
- 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)