O'Reilly logo

Test Scoring and Analysis Using SAS by Jeffrey Smith, EdD Ron Cody

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Chapter 8: An Introduction to Item Response Theory - PROC IRT

Introduction

IRT basics

Looking at Some IRT Results

What We Aren’t Looking At!

Preparing the Data Set for PROC IRT

Running PROC IRT

Running Other Models

Classical Item Analysis on the 30-Item Physics Test

Conclusion

References

Introduction

IRT stands for Item Response Theory, an approach to analyzing test data and building tests that has been in development since the 1960s. It is sometimes referred to as modern test theory as opposed to classical test theory, which employs concepts like Cronbach’s coefficient alpha and item/test correlations. Although classical test theory is still widely used, especially in cases where the test is used only once and for situations where the number ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required