Professor Sukanlaya Sawang
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Psychometric properties
The validity and reliability of the measurement tool

Before being able to state that a questionnaire has excellent psychometric properties, meaning a scale is both reliable and valid, it must be evaluated extensively [Portney and Watkins 2009]
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Way of coping Checklist Revised (Thai version)
DASS-21 (Thai version)
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Photo from Barbara Eckstein
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