Inclusion Criteria:  ability to read, write and speak English fluently  Exclusion Criteria:  Being diagnosed with Parkinson's, Parkinsonian dementia, Huntington disease, speech significant aphasia and intellectual disability, major depression/anxiety, bipolar disorder, schizophrenia or any other major mood disorder Having a History of epileptic seizures or epilepsy Inability to adequately communicate in English Impaired vision or hearing severe enough to impair performance in cognitive tests Current substance abuse disorder Currently participating in another therapeutic study for dementia Plan to change the medication during this study's period