Thai version of Rosenberg Self-Esteem Scale (RSES)
The Rosenberg Self-Esteem Scale (RSES) is one of the most widely used self-esteem instruments in the world. It was developed by Morris Rosenberg in 1965. The scale is in the public domain. Dr. Wongpakaran (together with Dr. Tinakon Wongpakaran) has been working on the Thai versions for many years since a few previous Thai versions available in Thailand gave unsatistied construct validity.
The first Thai version they developed was discussed in this paper >> [Wongpakaran T, Wongpakaran N. Confirmatory factor analysis of Rosenberg Self-Esteem Scale: A study of Thai student sample. J Psychiatr Assoc Thailand. 2011;56(1):59-70.] [Full-text, Thai]
They then revised the item 8, and made a new/revised version (R) which was studied and published in this paper >> Wongpakaran T, Wongpakaran N. A Comparison of Reliability and Construct Validity between the Original and the revised version of the Rosenberg Self Esteem Scale. Psychiatry Investig. 2012;9(1):54-8. [Full-text] The scale is posted here >> Rosenberg Self Esteem-revised_TNK.pdf
However, they have found the revised version still needs more work to give better psychometric properties. This latest has been tested and gave more satisfactory. This modified (M) Thai version is on the way to publication.
Update 12 May 2020