DyslexiaNCT03285789
Dyslexics' Visual Attention Field
A study testing Passing tests in dyslexics with reduced eva in people with Dyslexia, run by Hospices Civils de Lyon at 1 site in France.
Trial 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). Read more about this study
- Who is it for?
- Ages 3 to 12 yearsHealthy volunteers can take part
- Conditions the study is for
- Dyslexia
- What is being tested?
- Passing tests in dyslexics with reduced eva
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 1,460 participants
- Where
- 1 siteFrance
- Study dates
- 25 Jul 2018to 21 Oct 2026
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 3 to 12 years
- All sexes
- Healthy volunteers accepted
- Child
Who may be able to join
- normal or corrected to normal vision
- diagnosed dyslexics with a recent "alouette" test
Who cannot join
- other developmental problem (dysphasia, dyspraxia, ADHD)
- strabismus, amblyopia, oculomotor paralysis
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Evaluation of the Visuo-attention Field of Symbols Versus Objects Visual Search in Dyslexic Subjects. DyslexiaSPOTLIGHT
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.
- Conditions
- Dyslexia
- Being tested
- Passing tests in dyslexics with reduced eva, Passing tests in controls
- Keywords
- Dyslexia, Visual Fields, visual attention span, visual search, visual attention field
- Medical subject headings
- Dyslexia
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Passing tests in dyslexics with reduced evaOther
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.
Passing tests in controlsOther
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.
| Study group | Role | What they receive |
|---|---|---|
| Dyslexics with reduced visual attention span | Experimental | 21 subjects diagnosed dyslexics with reduced visual attention span Receives: Other: Passing tests in dyslexics with reduced eva |
| Dyslexics with normal visual attention span | Experimental | Not described Receives: Other: Passing tests in dyslexics with reduced eva |
| controls | Active comparator | Not described Receives: Other: Passing tests in controls |
What is being measured
The primary outcome is the main question the study is designed to answer.
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.
Measured: Day 0
Secondary outcomes (4)
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)
Measured: 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.
Measured: 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.
Measured: 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.
Measured: Day 0
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted18 Sep 2017
- Study start25 Jul 2018
- Primary completion21 Oct 2026 (estimated)
- Study completion21 Oct 2026 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for DyslexiaStudies of the same condition, open and under way.
- More trials run by Hospices Civils de LyonThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Other
- Allocation
- Non-randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 1,460 participants (actual)
Sponsor and investigators
- Lead sponsor
- Hospices Civils de Lyon
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Laure PISELLA, PhD, Principal investigator, INSERM U1028 - Impact - CRNL
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT03285789
- Sponsor's protocol ID
- 69HCL17_0333
- Other IDs
- 2017-A02525-48
- Status last verified
- Feb 2024
- First submitted
- 14 Sep 2017
- Last updated
- 29 Feb 2024
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 29 Feb 2024. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Evaluation of the Visuo-attention Field of Symbols Versus Objects Visual Search in Dyslexic Subjects. DyslexiaSPOTLIGHT
- ClinicalTrials.gov ID
- NCT03285789
- Acronym / sponsor ID
- 69HCL17_0333
- Conditions
- Dyslexia
- Keywords
- Dyslexia, Visual Fields, visual attention span, visual search, visual attention field
- Study type
- Interventional
- Recruitment status
- Unknown status
- Enrolment
- 1,460 participants (actual)
- Lead sponsor
- Hospices Civils de LyonUniversity, hospital or other
- Study start
- 25 Jul 2018 (actual)
- Primary completion
- 21 Oct 2026 (estimated)
- Study completion
- 21 Oct 2026 (estimated)
- First posted
- 18 Sep 2017 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
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.
Study design
- Primary purpose
- Other
- Allocation
- Non-randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 3
| Arm | Type | Receives |
|---|---|---|
| Dyslexics with reduced visual attention span | Experimental | Other: Passing tests in dyslexics with reduced eva21 subjects diagnosed dyslexics with reduced visual attention span |
| Dyslexics with normal visual attention span | Experimental | Other: Passing tests in dyslexics with reduced eva |
| controls | Active comparator | Other: Passing tests in controls |
Who may qualify
- Ages
- 3 to 12 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Child
Key inclusion criteria (2 listed)
- normal or corrected to normal vision
- diagnosed dyslexics with a recent "alouette" test
Key exclusion criteria (2 listed)
- other developmental problem (dysphasia, dyspraxia, ADHD)
- strabismus, amblyopia, oculomotor paralysis
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Passing tests in dyslexics with reduced evaVisual 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. | Other | Dyslexics with normal visual attention span, Dyslexics with reduced visual attention span |
| Passing tests in controlsVisual 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. | Other | controls |
Primary outcome
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.
4 secondary outcomes
respond time in function of the distractors' number
Time frame: Day 0
visual exploration of the scene
Time frame: Day 0
visuo-spatial perception
Time frame: Day 0
visual attention span (VAS)
Time frame: Day 0
Results and safety
Results are not available in the source record.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 29 Feb 2024.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Laure PISELLA, PhD principal investigator
INSERM U1028 - Impact - CRNL
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Passing tests in dyslexics with reduced eva in people with Dyslexia, run by Hospices Civils de Lyon at 1 site in France.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: status not confirmed, as of the sponsor's last update on 29 Feb 2024. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in France. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
Results are not available in the source record.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Respond time in visual search in different condition of view (full view or reduced view) with separable feature. (time frame: Day 0). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 29 Feb 2024; AzTrials last refreshed its copy on 27 Oct 2026.