Inclusion Criteria:  Aged 50 years old or above. Cases with sanity and ability to communicate in Chinese or Taiwanese. No oral difficulties in daily life, able to fully express research-relevant narratives and readings.  Exclusion Criteria:  Patients with a history of stroke diagnosed by a physician. Non-Republic of China (Taiwan) nationality. Worked as a medical staff in the past, in the fields of medical care or health educator. Those who cannot complete the assessment according to the guidance of the assessor.