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Researchers at the Department of Experimental Psychology, University of Oxford are seeking men who stutter for a trial investigating whether Transcranial Direct Current Stimulation (tDCS) can improve speech fluency in people who stutter.

tDCS is a non-invasive and painless way of stimulating the brain by passing a very weak electrical current across the head between two large sponge electrodes placed on the scalp. Volunteers should be male, aged 18-45 years and native English speakers. You will be asked questions about your medical history to check your suitability for an MRI scan and brain stimulation.

The study involves five visits to receive tDCS and fluency training. These can take place either in Oxford or at another mutually convenient location. The study also involves MRI scanning of the brain and vocal tract, and transcranial magnetic stimulation (TMS), which will take place during one or two visits to the OHBA Centre at the Warneford Hospital in Oxford. MRI gives very detailed pictures of structure and function. TMS is used here to measure the excitability of the brain areas involved in speech production. These methods are non-invasive and do not involve ionising radiation. We will reimburse volunteers for their time and cover reasonable travel expenses.

If you are interested in participating in this study and/or would like further information, please contact the Speech and Brain Research Group on 

We also have a website, which can provide more information about the study: 


Ethics: CUREC Ref. No.: R52173/RE001