APPROXIMATE EXPRESSIONS FOR PARAMETER ESTIMATES IN THE RASCH MODEL

被引:24
作者
COHEN, L
机构
[1] Faculty of Mathematical Studies, University of Southampton, Southampton
关键词
D O I
10.1111/j.2044-8317.1979.tb00756.x
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
The Wright‐Panchapakesan (1969) maximum‐likelihood equations for estimating the ability and difficulty parameters in the Rasch model have hitherto required an iterative procedure for their solution. In this paper the equations are solved approximately and simple closed forms are established which give values close enough for most practical purposes to those obtained by iteration. The results are illustrated with reference to a 50‐item physics test. 1979 The British Psychological Society
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收藏
页码:113 / 120
页数:8
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