Home-based Transcranial Direct Current Stimulation (tDCS) for Behavioral Symptoms in Alzheimer's Disease and Related Dementias (ADRD)

All participants will receive active tDCS with a constant current intensity of 2mA. Anodal tDCS will be applied to the left dorsolateral prefrontal cortex, while cathodal electrode will be positioned on the right dorsolateral prefrontal cortex. Caregivers will help setting up and administering tDCS for participants with AD at home. tDCS will be applied for 30min at an intensity of 2mA, with 30 s ramping up and down.