Methods in scaling the basic competence test

Shun Wen Chang*


研究成果: 雜誌貢獻期刊論文同行評審

6 引文 斯高帕斯(Scopus)


This study evaluates the effects of employing the linear, normalizing, and arcsine transformation methods for constructing scale scores on the Basic Competence Test (BCTEST). Tests in three subject areas (Chinese, English, and Mathematics) were studied using the data of test administrations from 2001 to 2003. The resulting scale scores for each test over the years were examined with respect to the graphs of the raw-to-scale score conversions, summary statistics, and measurement properties calculated based on the strong true score theory. The effects of adjustments in rounding and truncating and the gaps resulting from the conversions were explored. The findings provided sufficient evidence that employing the arcsine transformation stabilized the error variability along almost the entire scale. But the linear transformation produced the most satisfactory results regarding the gap sizes, and the normalizing approach produced similar distributional properties among the tests. This research has revealed useful information about the features of scales based on different transformation approaches.

頁(從 - 到)907-929
期刊Educational and Psychological Measurement
出版狀態已發佈 - 2006 12月

ASJC Scopus subject areas

  • 教育
  • 發展與教育心理學
  • 應用心理學
  • 應用數學


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