This article advances a simple conception of test validity: A test is valid for measuring an
attribute if (a) the attribute exists and (b) variations in the attribute causally produce variation …

Publisher Summary This chapter begins with the history of the Rasch models (RM) and also
discusses some basic concepts and properties of the RM. According to Georg Rasch, the …

This book develops an intuitive understanding of IRT principles through the use of graphical
displays and analogies to familiar psychological principles. It surveys contemporary IRT …

Written by a leading expert in both language testing and the nature of reading in a second or
foreign language, this book provides a comprehensive treatment of the assessment of …

Item response theory (IRT) is a latent variable modeling approach used to minimize bias and
optimize the measurement power of educational and psychological tests and other …

Is it possible to measure psychological attributes like intelligence, personality and attitudes
and if so, how does that work? What does the term'measurement'mean in a psychological …

A model is proposed that combines the theoret ical strength of the Rasch model with the
heuristic power of latent class analysis. It assumes that the Rasch model holds for all …

This chapter on the latent class model has three purposes: The latent class model (LCM) is
introduced in a way that assumes little prior knowledge of the model. This introduction does …

This article gives an introduction to latent class, latent profile, and latent transition models for
researchers interested in investigating individual differences in learning and development …

This paper analyzes the theoretical, pragmatic, and substantive factors that have hampered
the integration between psychology and psychometrics. Theoretical factors include the …