Thirty Years of Nonparametric Item Response Theory

Reliability Estimation for Single Dichotomous Items based on Mokken's IRT Model

Item reliability is of special interest for Mokken’s nonparametric item response theory, and is useful for the evaluation of item quality in nonparametric test construction research. It is also of interest for nonparametric person-fit analysis. Three methods for the estimation of the reliability of single dichotomous items are discussed. All methods are based on the assumptions of nondecreasing...

Cognitive Assessment Models With Few Assumptions, and Connections With Nonparametric Item Response Theory

Selection the best Method of Equating Using Anchor-Test Design‎ in Item Response Theory ‎‎

Explaining the problem. The equating process is used to compare the scores of the two different tests with the same theme‎. ‎The goal of this research is finding the best method of equating data using Logistic model. ‎ Method. we are using the data of Ph.D‎. ‎test in Statistic major for two consecutive years 92 and 93‎. ‎For analyzing‎, ‎we are specifically using the tests of Statistics major ...

A Bayesian Nonparametric Model Fit statistic of Item Response Models

Psychometric Properties of State Level Subjective Vitality Scale based on classical test theory and Item-response theory

The purpose of the present study was to investigate the factor structure and Item-Response parameters of State Level of Subjective Vitality Scale. The research design was correlational, and the statistical population consisted of students of the Shahid Beheshti University of Tehran. Sample group including 240 students were selected through multi-stage sampling and completed Subjective Vitality ...