tDCS in Adults With ASD and/or ADHD Without Intellectual Disability

Inclusion Criteria: Adults aged 18 to 55 years Clinical diagnosis of Autism Spectrum Disorder (ASD) and/or Attention-Deficit/Hyperactivity Disorder (ADHD) confirmed via medical records or structured clinical interview Able to provide informed consent Fluent in the language used for assessments and cognitive training tasks Stable medication regimen (if applicable) for at least 4 weeks prior to enrollment Willing and able to attend 10 consecutive weekday sessions and follow-up assessment Exclusion Criteria: History of epilepsy, seizures, or significant neurological disorder (e.g., traumatic brain injury, stroke) Current diagnosis of psychotic disorder or bipolar disorder Presence of metal implants in the head (excluding dental work), pacemaker, or other contraindications to tDCS Current substance use disorder (within past 6 months) Pregnant or planning to become pregnant during the study period Participation in another intervention study within the last 30 days Any condition that, in the opinion of the investigators, may make participation unsafe or interfere with study procedures