NCT02840370.

Methods	Randomised cross‐over trial
Participants	Actual enrolment: 16 Inclusion criteria: chronic aphasia due to ischaemic or haemorrhagic stroke (> 6 months post‐stroke), French as dominant language, right‐handedness, left hemisphere lesion with intact bilateral prefrontal cortex Exclusion criteria: diagnosed dementia or psychiatric comorbidity, epileptic seizure within the last 12 months, metallic head implants, pacemaker, inability to understand procedures or insufficient language production abilities, pregnancy, strong headache on the days of the tDCS sessions, consumption of alcohol and/or unprescribed drugs on the days of the tDCS sessions or on the day before
Interventions	2 arms: ‐ tDCS over the prefrontal cortex with 1 to 2 mA for 20 minutes ‐ S‐tDCS over the prefrontal cortex for 20 minutes
Outcomes	Outcomes will be measured up to 30 minutes after intervention: Primary outcome measure: ‐ picture‐naming task, repetition task and verbal fluency task Secondary outcome measure: ‐ non‐verbal executive functions task
Notes	Study completed in September 2017

C‐tDCS: cathodal tDCS
 RCT: randomised controlled trial
 S‐tDCS: sham tDCS