Effects of EEG- Microstate Neurofeedback on Attention and Impulsivity in Adult Attention-deficit/Hyperactivity Disorder (ADHD) and Neurotypical Controls

ADHD POPULATION GROUP A subject will be eligible if all the following criteria apply: * Age: between 18-50 years * Gender: male and female * Health: general good health and normal or corrected-to-normal visual acuity * Patients clinically able to stop the following psychotropic medications for 48h: psychostimulants, benzodiazepines * Having provided written informed written consent A subject will not be eligible if any of the following criteria apply: * Past or current history of a clinically significant central nervous system disorder, including structural brain abnormalities; cerebrovascular disease; history of other neurological disease, epilepsy, stroke or head trauma (defined as loss of consciousness \> 5 min or requiring hospitalization) * Impaired vision (normal or corrected acuity below 20/40) * Medical illness (e.g., cardiovascular disease, renal failure, hepatic dysfunction) * Comorbidities with current psychiatric disorders (bipolar disorder, borderline personality disorder, major depressive disorder, anxiety disorder) including substance use disorder as defined by the DIGS. HEALTHY POPULATION GROUP A subject will be eligible if all of the following criteria apply: * Age: between 18-50 years * Gender: male and female * Health: general good health and normal or corrected-to-normal visual acuity * Having provided written informed written consent A subject will not be eligible if any of the following criteria apply: * Past or current history of ADHD * Past or…