Reading is a significant skill in many Foreign Language Learning contexts, and one of the personal traits that may influence foreign language learners' reading ability is ambiguity tolerance, which may itself be affected by a number of factors. This book explores the effect of using information gap and opinion gap tasks on language learners' ambiguity tolerance in the reading skill. It includes both a literature review and an empirical analysis of the subject. Language learners and teachers, researchers as well as syllabus designers may find this book relevant and interesting.