Development and Psychometric Evaluation of Intention to Drug Avoidance Scale (IDAS) for Thai Adolescents

Main Article Content

Pichet Suwanchinda Wandee Suttharangsee Vineekarn Kongsuwan

Abstract

         Purpose: The purpose of this study was to develop and evaluate psychometric properties of
the Intention to Drugs Avoidance Scale (IDAS) for Thai adolescents.
          Design: A methodological research was used to develop a newly intention to drug avoidance scale for Thai adolescents. Both qualitative and quantitative methods were used for data collection.
          Methods: The development of the IDAS consisted of determination of content domains, items generation, and then psychometric evaluation regarding content validity, construct validities in terms of exploratory factor analysis (EFA) and known groups, and reliability. Three hundred and sixty-nine Thai adolescents with no history of drug use were stratified random sampling from high schools in every parts of Thailand as a sample for construct validity test of the scale. Another 60 Thai adolescents were recruited from drug treatment center (n = 30) and a high school (n = 30) in the south of Thailand for field testing and test-retest.
         Main findings: The final version of the 22 items of the IDAS has 2 factors. The first factor, desire and commitment to avoid drugs, was comprised of 15 items that explained 42.26% of the variance with the factor loadings from .54 to .86. The second one was readiness to avoid drugs, which had 7 items with 10.73% of the variance and the factor loadings from .55 to .86. In addition, the construct validity of this instrument by using known groups indicated that there was a significant difference between adolescents who used and did not use drug. Alpha coefficient as indicating internal consistency reliability yielded the value of .94 and the stability which demonstrated by test-retest reliability has a high stability reliability (r = .77, p = < .01) over a two-week period.
         Conclusion and recommendations: The result revealed that the IDAS for Thai adolescents
had 2 factors with a valid and reliable properties for evaluation of intention to drugs avoidance of Thai adolescents. It should be beneficial for researcher and health care providers in using this tool in the future.

Keywords

Article Details

How to Cite
Suwanchinda, P., Suttharangsee, W., & Kongsuwan, V. (2019). Development and Psychometric Evaluation of Intention to Drug Avoidance Scale (IDAS) for Thai Adolescents. Nursing Science Journal of Thailand, 37(3), 4-17. Retrieved from https://www.tci-thaijo.org/index.php/ns/article/view/193512
Section
Research Papers

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