Approximating the conditional distribution of person fit indexes for checking the Rasch model

被引：11

作者：

Bedrick, EJ

机构：

[1] Dept. of Mathematics and Statistics, University of New Mexico, Albuquerque

来源：

PSYCHOMETRIKA | 1997年 / 62卷 / 02期

关键词：

Edgeworth expansion; exact p-value; saddlepoint approximation;

D O I：

10.1007/BF02295274

中图分类号：

O1 [数学];

学科分类号：

0701 ; 070101 ;

摘要：

We present a simple approximation to the conditional distribution of goodness-of-fit statistics for the Rasch model, assuming that the item difficulties are known. The approximation is easily programmed, and gives relatively accurate assessments of conditional p-values for tests of length 10 or more. A few generalizations are discussed.

引用

页码：191 / 199

页数：9

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