A Note on the Item Information Function of the Four-Parameter Logistic Model

被引：28
|
作者：
Magis, David [1 ,2 ]
机构：
[1] Univ Liege, B-4000 Liege, Belgium
[2] Katholieke Univ Leuven, Louvain, Belgium
来源：
APPLIED PSYCHOLOGICAL MEASUREMENT | 2013年 / 37卷 / 04期
关键词：
item response theory; four-parameter logistic model; item information function; maximization; ABILITY;
D O I：
10.1177/0146621613475471
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：
This article focuses on four-parameter logistic (4PL) model as an extension of the usual three-parameter logistic (3PL) model with an upper asymptote possibly different from 1. For a given item with fixed item parameters, Lord derived the value of the latent ability level that maximizes the item information function under the 3PL model. The purpose of this article is to extend this result to the 4PL model. A generic and algebraic method is developed for that purpose. The result is practically illustrated by an example and several potential applications of this result are outlined.
引用
收藏
页码：304 / 315
页数：12
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