a-stratified multistage computerized adaptive testing with b blocking

被引：89
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
收藏
页码：333 / 341
页数：9
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