Summary:
In many studies in Malaysia, several issues in providing evidence toward construct validity have been observed. In most problem cases, studies only provided face validity, factor analysis and reliability index yet claimed their instruments have sufficient construct validity. Another issue was a mix-up on assessment-type and perception-type items. Finally, insufficient sampling and targeting during pilot fail to provide empirical evidence on content validity. This paper presents the construct validity requirements according to Messick’s construct validity framework and proposes several methods to deal with the above issues.
Refers:
[1] Adams, R. J., Wu, M. L., & Wilson, M. (2012). The Rasch rating model and the disordered threshold controversy. Educational and Psychological Measurement, 72(4), 547-573.
[2] Bond, T. G., & Fox, C. M. (2013). Applying the Rasch model: Fundamental measurement in the human sciences. Psychology Press.
[3] Messick, S. (1995). Validity of psychological assessment: Validation of inferences from persons’ responses and performances as scientific inquiry into score meaning. American psychologist, 50(9), 741
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