ISSN 0439-755X
CN 11-1911/B
主办：中国心理学会
　　　中国科学院心理研究所
出版：科学出版社

心理学报 ›› 1993, Vol. 25 ›› Issue (4): 61-65.

• • 上一篇    下一篇

信度系数与观测分数和潜在特质的相关比

陈希镇   

  1. 莆田高等专科学校 福建,351100
  • 发布日期:1993-12-25 出版日期:1993-12-25
  • 通讯作者: 陈希镇

RELIABILITY COEFFICIENT AND CORRELATION RATIO BETWEEN THE OBSERVED SCORES AND LATENT TRAIT

Chen Xizhen Putian Institute, Fujian   

  • Online:1993-12-25 Published:1993-12-25

摘要： 在经典真分数模型中,信度系数R=D(T)/D(X)。通常认为,信度系数与项目反应理论没有什么联系。事实上,信度系数恰好等于考生观测分数与潜在特质分数的非线性相关比η_(xθ)~2=1-MD(x|θ)/D(X),据此我们得出估计信度系数的一种新途径,同时讨论了x、θ的相关系数与相关比η_(xθ)~2的关系。

关键词: 信度系数, 相关比, 潜在特质, 经典测验理论, 项目反应理论, 信度估计

Abstract: Reliability is a very important idea in classical test theory. Under classi-cal true score model reliability coefficient R=D(T)/D(x). In general, it isconsidered that there exists no relation between reliability and item responsetheory. But it is interesting to notice that reliability coefficient is just thesame as η_X~2θ=1-MD(x/θ)/D(x), which is nonlinear correlation ratio be-tween the examinee's observational scores and latent trait scores. A new me-thod of estimating reliability was obtained on the basis of the relation. Therelationship between coefficient of correlation and correlation ratio between xand θ are discussed.

Key words: reliability coefficient, correlation ratio, latent trait, classical test theory, item response theory, reliability estimating