Each of the 29 reviews in this book provides a state-of-the-art report of research into a different aspect of assessment of first and/or second language ability. There are sections on the testing of individual skills, methods of assessment, quantitative and qualitative approaches to test validation, and the ethics and effects of testing and assessment. The volume is specifically aimed at researchers who are looking for a brief synopsis of past and present research in a specific field, but will also be useful as a general introduction to research in language assessment for applied linguists and language teachers.