Ingersoll-Dayton, Berit, Chanpen Saengtienchai, Jiraporn Kespichayawattana, and Yupin Aungsuroch. 2004. "Measuring Psychological Well-Being: Insights From Thai Elders." The Gerontologist, 44(5): 596-604.
Dayton et al developed a measure of psychological well being based on the indigenous expertise of Thai elders. Confirmatory factor analysis suggested that psychological well-being has two components: intrapersonal and interpersonal.