Explanatory item response theory models: Theory and application

Randomized Item Response Theory Models

The randomized response (RR) technique is often used to obtain answers on sensitive questions. A new method is developed to measure latent variables using the RR technique because direct questioning leads to biased results. Within the RR technique is the probability of the true response modeled by an item response theory (IRT) model. The RR technique links the observed item response with the tr...

Explanatory Item Response Models: A Brief Introduction

In this chapter we illustrate the use of item response models to analyze data resulting from the measurement of competencies. These item response models deal with data from an instrument such as a test, an inventory, an attitude scale, or a questionnaire – we will call this “test data”. The main purpose of using item response models is the measurement of propensities: specifically, abilities, s...

Item Response Theory

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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 ...

Comparing Multiunidimensional and Unidimensional Item Response Theory Models