Subjects will first receive active tDCS, plus home activity based cognitive-linguistic therapy then they will cross over to the home-based sham treatment arm after a 4-8-week washout period.

Subjects will first receive sham tDCS, plus home activity based cognitive-linguistic therapy then they will cross over to the home-based active treatment arm after a 4-8-week washout period.

Subjects will be seen in person to first receive active tDCS for 12 sessions over 4 weeks, and cross-over to the lab-based sham treatment arm after an 8 week washout period.

Subjects will be seen in person to first receive sham tDCS for 12 sessions over 4 weeks, and cross-over to the lab-based active treatment arm after an 8 week washout period.

Participants will receive transcranial direct current stimulation (tDCS) via the Soterix device at an intensity of 2 mA for 20 minutes per session, with slow ramp-up and ramp-down of the current.

Each participant will be asked to perform tDCS on weekdays for two-weeks (10 sessions total) or every other weekday for four weeks (12 sessions). The research team will decide on a number of therapy sessions depending on the patient's baseline condition and tolerance. Patients who receive 10 sessions of therapy over two weeks will have 4 weeks of washout. Patients who receive 12 sessions over four weeks will have 8 weeks of washout.

The Stricker Learning Span (SLS) is a computer-adaptive digital word list memory test specifically designed for remote assessment and self-administration on a web-based multi-device platform (Mayo Test Drive).

The exam includes a standard protocol including sentence and word repetition, standard reading passage, vowel prolongation, speech alternating motion rates , sequential motion rates, picture description, naming, and animal fluency

Western aphasia battery assesses linguistic skills most frequently affected by aphasia such as content, fluency, auditory Comprehension, repetition and naming, reading, writing.