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Item-Item Curves and Consistent Mental Test Parameter Estimates

Author(s):
Levine, Michael V.
Publication Year:
1976
Report Number:
RB-76-36
Source:
ETS Research Bulletin
Document Type:
Report
Page Count:
23
Subject/Key Words:
Aptitude Tests, Mathematical Models, Psychometrics, Statistical Analysis

Abstract

It is shown that empirical mental test P-P plots are approximately equal to theoretical item-item curves, at least for long tests administered to many people. This result is important because it leads to (1) a distribution free method for estimating points on item-item curves, (2) a general method for defining estimates of item parameters and (3) the only parameter estimation method known to be consistent for some of the most important aptitude test models. (23pp.)

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