How do you know if the items of a test are hard or easy; fair or biased; accurate at measuring ability or not? 
Item Response Theory (IRT).
In this training, you will see, with real life examples, how IRT answers these questions to assess a test.
rasch model
Member Training: Introduction to Item Response Theory and Rasch Models
November 1st, 2024 by TAF SupportMember Training: Item Response Theory and Rasch Models
August 1st, 2013 by David LillisItem Response Theory (IRT) refers to a family of statistical models for evaluating the design and scoring of psychometric tests, assessments and surveys. It is used on assessments in psychology, psychometrics, education, health studies, marketing, economics and social sciences — assessments that involve categorical items (e.g., Likert items).
In this webinar, you will learn about:
- The key ideas and techniques of IRT, with examples from educational assessment
- The Rasch Model and the Graded Response Model — two of the most commonly-used IRT models
- A range of analytic techniques that should be used in conjunction with IRT
This webinar will introduce you to the basic ideas and applications of IRT, and show how you can acquire the skills necessary to conduct IRT analysis at the professional level.
Note: This training is an exclusive benefit to members of the Statistically Speaking Membership Program and part of the Stat’s Amore Trainings Series. Each Stat’s Amore Training is approximately 90 minutes long.
About the Instructor
David Lillis is an applied statistician in Wellington, New Zealand.
His company, Sigma Statistics and Research Limited, provides online instruction, face-to-face workshops on R, and coding services in R.
David holds a doctorate in applied statistics and is a frequent contributor to The Analysis Factor, including our blog series R is Not So Hard.
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