Inclusion Criteria:  Patients diagnosed with Probable Alzheimer's Disease according to DSM-5 criteria; In the early stage of AD (MMSE from 20 to 25); Age from 60 - 80 years old; Received greater than 5 years of formal education  Exclusion Criteria:  Patients with concomitant diseases (heart failure, kidney failure, liver failure or thyroid diseases) that affect cognitive functions; Diagnosed with other neuropsychological diseases (stroke, head trauma, depression, schizophrenia, sleep disorders…); Having major visual, auditory, reading or writing impairments; Patients and/or caregivers who decline to participate.