Impact of Motor Tasks and Lidocaine on Reading Unfamiliar Words in Adults With and Without Dyslexia (NCT05854082) | Clinical Trial Compass
CompletedPhase 4
Impact of Motor Tasks and Lidocaine on Reading Unfamiliar Words in Adults With and Without Dyslexia
Canada56 participantsStarted 2023-08-24
Plain-language summary
Recent claims report that reading ability is partially dependent on speech production. While the evidence for this claim is compelling, it is not known to what extent, the speech production system contributes to successful reading performance in adult populations with dyslexia. One direct way to determine the influence of speech production feedback on reading performance is to measure reading performance in adults with dyslexia with an added motor component (i.e., sucking on a lollipop, holding a bite bar or numbing their oral mucosa with lidocaine).
To adults with and without dyslexia 18 years of age and older (60 in total; 30 in each group), three experimental tasks will be administered under four conditions (no motor task, lollipop, bite bar and lidocaine). The first task asks whether the letter string being presented is a word or a nonword. Secondly, a motor sequencing task will be administered where adults will be asked to label pictures. For all tasks, the accuracy and speed of responses will be measured by a computer while participants wear a fNIRS cap.
Who can participate
Age range
18 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* All participants will be healthy and need to be proficient in English as the assessment materials are only available in English.
* Adult participants must weigh at least 50 kg or 110 lbs to avoid any possible toxic effects from the lidocaine.
Exclusion Criteria:
* Participants must have no personal or family history of adverse reactions to anesthetics to complete all the conditions.
* Participants who cannot consume sugary products will also be excluded.
* Additional exclusion criteria include: severe kidney disease; severe liver disease; treatment with class I antiarrhythmic drugs (such as mexiletine) or class III antiarrhythmic drugs (such as amiodarone)
* lack of integrity of oral mucosa\]
* allergy to non-medicinal ingredients and preservatives (and related compounds) of Lidocaine Viscous, such as methylparaben, propylparaben, paraaminobenzoic acid, saccharin, artificial colours and flavour
* concomitant use of another anaesthetic containing lidocaine or another amide
* participant being pregnant or suspecting that she might be pregnant
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.