Language testers are increasingly directing their attention to thedevelopment of computer-adaptive testing (CAT) instruments for assessing learners' second language ability. This book examines CAT instruments used to assess the receptive skills, with a strong focus on reading ability, as well as a critical discussion of CAT practices from the point of view of performance assessment. This volume is the first to adopt a multi-disciplinary approach and is written by leading scholars in their respective fields.