An interventional study of Passing tests in dyslexics with reduced eva and Passing tests in controls in Dyslexia, sponsored by Hospices Civils de Lyon. Active, not recruiting at 1 site in France. Open to participants aged 3 Years to 12 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2024-02-29.
Sponsored by Hospices Civils de Lyon · Not applicable, Interventional, and Other
Among 27 studies in Dyslexia with a site in France — 2 open to participants now, 3 under way, none of them phase 3. Dyslexia · France.
Among the 27 studies in Dyslexia with a site in France, this one is the 2nd largest by enrollment of the 22 interventional ones, is one of 3 that started in 2018, is one of 22 with no phase, and was the 10th registered.
127 studies on the registry are indexed under Dyslexia; 27 are open to participants now.
This study's enrollment of 1,460 is above the median of 71 across 106 interventional studies indexed under Dyslexia.
Browse Dyslexia studies →2 of the 27 studies in Dyslexia with a site in France are open now, in 1 country. Each count lists the studies.
Of the 18 Dyslexia studies recruiting now, 2 (11%) set no upper age limit and 14 (78%) stop at 75 or younger; 13 take children under 18; 11 take healthy volunteers.
This study: 3 Years to 12 Years · all sexes · healthy volunteers too.
The full table on the hub →27 studies; the count open now beside each. This study's row is marked.
First in 2003; this study’s year is marked. 3 started in 2018.
Median enrollment 61 across the 22 interventional studies, 161 across the 5 observational. Of the 22 that completed or were terminated, 0 (0%) have results posted.
7 of 27 have an industry lead sponsor. The 10 most frequent:
Hospices Civils de Lyon is the lead sponsor of 1,866 studies on the registry; 448 are open to participants now.
Hospices Civils de Lyon has 4 studies filed under Dyslexia — fewer than ten, so there is no comparison to draw.
None of the studies under way reaches primary completion within a year.
Among the 27 studies in Dyslexia with a site in France, from their registry updates:
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.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
21 subjects diagnosed dyslexics with reduced visual attention span
Other: Passing tests in dyslexics with reduced eva
Other: Passing tests in dyslexics with reduced eva
Other: Passing tests in controls
Visual attention span : the subject see a 5 letters strings during 200 ms and he has to report it orally whatever the order Visual search : the subject has to find a target among distractors (24 or 48) in different conditions of stimuli (conjunction feature or separable feature) and different conditions of view (full view or reduced view with the moving window paradigm) Elementary visuo spatial perception: the subject passes 6 visuo spatial tests to judge his visuo spatial abilities. All of these tests will be made during an unique visit of 1h30.
Visual attention span : the subject see a 5 letters strings during 200 ms and he has to report it verbally whatever the order Visual search : the subject has to find a target among distractors (24 or 48) in different conditions of stimuli (conjunction feature or separable feature) and different conditions of view (full view or reduced view with the moving window paradigm) Elementary visuo spatial perception: the subject passes 6 visuo spatial test to judge his visuo spatial abilities. "test de l'alouette" : reading test during 3 minutes, we note the number of word read and the errors. We obtain lexical age. All of these tests will be made during an unique visit of 1h30.
Respond time in visual search in different condition of view (full view or reduced view) with separable feature.
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.
Time frame: Day 0
respond time in function of the distractors' number
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 collect his respond time. We compare the respond time between two number of distractors (24 or 48)
Time frame: Day 0
visual exploration of the scene
with an eye tracker the investigator will analyze the ocular movements during visual search (saccades and fixations) and the equip will compare the visual behavior between the different groups and the different conditions.
Time frame: Day 0
visuo-spatial perception
the investigator will test with different exercises the elementary visuo spatial perception of the participant and he will compare between groups and also he will make correlation with the respond time in visual search.
Time frame: Day 0
visual attention span (VAS)
the subject have to report orally a 5 letters' string presented during 200 ms, the investigator could see if a correlation exist between VAS and RT, VAS and visual exploration, VAS and visuo spatial perception.
Time frame: Day 0
Started Jul 2018 (actual). Primary completion is estimated for Oct 2026, 98 months after the start.
Of 62 non-industry interventional studies with no phase under Dyslexia, half reached primary completion within 24 months of starting (the median), counting those still running; a quarter within 10 and three quarters within 57. This study's planned 98 months is above that.
Counting every sponsor, half of 69 studies reached it within 24 months; a quarter within 9 and three quarters within 57.
How these figures are worked out, and which studies are left out of them.
This study is active, not recruiting, as verified in Feb 2024. You cannot join it, but the record below documents what was studied.
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