Construct Validity and Internal Consistency Reliability of the Thai Version of the Telephone-Based Cognitive Screening Tool


  • Watthanaree Ammawat Division of Occupational Therapy, Faculty of Physical Therapy, Mahidol University, Nakhon Pathom
  • Nonticha Thavornpaiboonbud Division of Occupational Therapy, Faculty of Physical Therapy, Mahidol University, Nakhon Pathom
  • Attapol Attanak Language Institute, Khon Kaen University, Khon Kaen
  • Keerathi Oanmun Physical Therapy Center, Faculty of Physical Therapy, Mahidol University, Bangkok
  • Thitiya Wangkawan Division of Occupational Therapy, Faculty of Physical Therapy, Mahidol University, Nakhon Pathom


cognitive screening, telephone survey, interviews, exploratory factor analysis


Objectives: To affirm the construct validity and internal consistency reliability of the Thai version of the Telephone-Based Cognitive Screening Tool (Thai-TeBCOG).

Study design: A cross-sectional study.

Setting: Health-promoting hospitals, elderly schools in Bangkok, Chiang Mai, Khon Kaen, Chon Buri, and Nakhon Si Thammarat, Thailand.

Subjects: Participants of the study were 225 healthy adult volunteers between the ages of 23 and 80 and were from Thailand’s city of Bangkok and provinces of Chiang Mai, Khon Kaen, Chon Buri, and Nakhon Si Thammarat. The volunteers were evaluated and assessed to be free of dementia, cognitive impairment, and depression.

Methods: Participants’ demographics and information were gathered using a number of instruments and two main procedures. Firstly, items on the screening instruments were addressed through face-to-face interviews lasting on average approximately 15 minutes. Secondly, the Thai-TeBCOG was administered  remotely over the phone for about 20 minutes. Cronbach’s alpha was used to measure internal consistency, and exploratory factor  analysis (EFA) was applied in assessing the questionnaire’s construct validity.

Results: There were 13 items on the Thai version of the Telephone-Based Cognitive Screening Tool. The internal consistency and the construct validity of the screening tool were examined by using Cronbach’s alpha coefficient and exploratory factor analysis, respectively. The results showed that the Thai-TeBCOG’s internal consistency was acceptable with a Cronbach’s alpha of 0.75. The construct validity of the tool was evaluated using EFA, and four extracted factors accounted for 54.48% of the total variance.

Conclusions: Four domains of individual differences were investigated. This study contributes to a growing body of knowledge aimed at increasing the effectiveness of cognitive screening tools for adults in different contexts.


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