a-stratified multistage computerized adaptive testing with b blocking

被引：86

作者：

Chang, HH

Qian, JH

Ying, ZL

机构：

[1] Univ Texas, Dept Educ Psychol, Austin, TX 78712 USA

[2] Rutgers State Univ, Piscataway, NJ 08855 USA

来源：

APPLIED PSYCHOLOGICAL MEASUREMENT | 2001年 / 25卷 / 04期

关键词：

adaptive testing; a stratification; b blocking; item exposure rate; item selection; test security;

D O I：

10.1177/01466210122032181

中图分类号：

O1 [数学]; C [社会科学总论];

学科分类号：

03 ; 0303 ; 0701 ; 070101 ;

摘要：

Chang & Ying's (1999) computerized adaptive testing item-selection procedure stratifies the item bank according to a parameter values and requires b parameter values to be evenly distributed across all strata. Thus, a and b parameter values must be incorporated into how strata are formed. A refinement is proposed, based on Weiss' (1973) stratification of items according to b values. Simulation studies using a retired item bank of a Graduate Record Examination test indicate that the new approach improved control of item exposure rates and reduced mean squared errors.

引用

页码：333 / 341

页数：9

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