Studying Development via Item Response Models: A Wide Range of Potential Uses

Abstract

In this chapter, we illustrate the spectrum of developmental questions that can be investigated using Rasch models (RMs). We structure the chapter by different types of developmental research questions. RMs are recommended as method of choice (1) for cross-sectional as well as longitudinal designs, and (2) for exploratory as well as theory-guided research questions. All aspects are illustrated by examples from a variety of constructs and life phases. At the end, we discuss the advantages and limitations of Rasch-based approaches for studying development. We hope to show that the focus of these models on the item level allows for a highly differentiated, substantively informative perspective on change.