ABSTRACT
This chapter provides the conceptual motivation for using techniques from the Rasch family of models and then provides a guide on how to use four different Rasch models: the simple Rasch model, the rating scale model, the partial credit model and the many-facet Rasch model. Rasch analysis offers a powerful, comprehensive way to analyze a variety of data types and can be used to answer a variety of questions posed in L2 research. The chapter focuses on the two Rasch programs, Winsteps and Facets. This chapter examines how to create input files for the different analyses and then scrutinize the most commonly used output tables of a Rasch analysis. It also examines some of the most common output tables and figures to illustrate the types of analyses that can be conducted using the Rasch models. The examples shows some of the range of research questions that can be answered with Rasch analyses, including answering research questions posed in interventionist research.
