Psychometric Theories and Analysis of Test Items

2024/2025

Academic Year

ENG

Instruction in English

6

ECTS credits

Delivered at:

Department of Educational Programmes

Course type:

Compulsory course

When:

1 year, 3, 4 module

Instructors

Ivanova, Alina

Kardanova, Elena

Course Syllabus

Abstract

Prerequisite: basic knowledge in statistics. This course introduces the fundamental concept of modern measurement theory, including Rasch measurement approach and item response theory (IRT) approach. The course starts with a short review of classical test theory, its connection to item response theory and basic assumptions of the latter. Smooth transition to Rasch measurement includes such topics as basic principles and basic assumptions of Rasch measurement. While presented Rasch models for dichotomous and polytomous data the students will learn how Rasch analysis constructs linear measures from scored observations. Theoretical and practical aspects of data analysis, output interpretation and reporting will be introduced. In addition to presenting the Rasch model, the course covers some basic methods for parameter estimation and for assessing fit and dimensionality, as well as differential item functioning (DIF). Introduction to linking and equating problems will be done. Further, the course addresses a variety of other dichotomous and polytomous item response theory (IRT) models, such as 1PL, 2PL, and 3PL models, GRM and GPCM models, and extensions, including topics of multidimensional and multifaced modelling. The course is accessible for students without a sophisticated background in psychometrics or statistics, as well as for those who want to gain a deeper understanding on measurement principles. The use of Winsteps and R software demonstrate how to apply the basic psychometric analysis methods to real-world examples in education and psychology.