Abstract：Scales are widely used in psychology and pedagogy. In medical researches, many diseases and unhealthy behavior can only be measured and evaluated indirectly by scales; however, the application of scales to the medical field is still a little backward and inadequate. This paper introduces the measurement theories which include test theory (CTT), generalizability theory (GT) and item response theory (IRT) and have been verified and commonly used in the psychology and pedagogy scales. CTT is widely used in the development of medical scales and has the advantages of simple operation and accurate calculation, but it only applies to simple linear models and limits its application in medicine. In pedagogy and psychology, a more cutting-edge measurement theory has been developed. As a complement to CTT, GT is more detailed and accurate than CTT in the reliability estimation based on multiple error sources. IRT introduces nonlinear models and related parameters, which make more detailed and in-depth analysis on the scale items and improve the quality of the scale. However, the above-mentioned two theories have not appeared in the development of medical scales due to their complexity and the existence of barriers between disciplines. It will have important theoretical and practical significance if the above-mentioned two theories are fully and widely applied and verified in the future medical scales.
张昊, 尚磊. 医学量表编制中的统计学方法进展[J]. 实用预防医学, 2019, 26(3): 381-385.
ZHANG Hao, SHANG Lei. Advancement on statistical methods in the development of medical scale. , 2019, 26(3): 381-385.
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