Standardization and Study of Some Psychometric Properties of the Washington University Sentence Completion Test (Long-form) among the Iranian Students

The Washington University Sentence Completion Test (WUSCT) is one of the tools used to assess personality. Personality assessment helps to make decisions, diagnose, and choose the right treatments. Therefore, this study aimed to investigate the standardization of some psychometric properties of the WUSCT among Iranian students.

The statistical population of this descriptive survey study included 287 medical students who were studying in Tehran, Iran, in the academic year 2015. Internal consistency, test-retest reliability, and inter-rater agreement were used to assess the reliability; moreover, the convergent validity was utilized to evaluate the construct validity of the WUSCT. The obtained data were analyzed in SPSS software (version 21).

The results of the present study indicated that the acceptable internal consistency of the WUSCT  (P<0.001). Furthermore, the test re-test reliability of the WUSCT was determined at 0.86 (P<0.001). The correlation between the total scores of the two examiners was obtained at 0.88 (P <0.001).  Moreover, the results of the convergent validity indicated the strongest correlation between ego development and ego strength (P<0.001).

The results of the present study indicated that the WUSCT had the appropriate and acceptable validity and reliability in Iranian society. Accordingly, this test can be an appropriate tool for measuring personality.