This book investigates the theoretical underpinnings and practical applications of language testing and assessment. It is designed for practitioners in applied linguistics and TESOL, offering a framework for understanding the rationale behind test use, various assessment techniques, and strategies for analyzing test quality. The text emphasizes the critical importance of reliability, validity, and fairness in language assessment, aiming to demystify the field for its readers. Ultimately, it equips individuals with the knowledge to optimally design and utilize language tests within given contexts, fostering good practice and research.

The book is positioned as an accessible gateway into the field of language assessment, providing both theoretical and practical knowledge for applied linguists and TESOL practitioners. It aims to ground readers' understanding of assessment principles in research and equip them to design and use tests effectively within specific resource constraints. The text emphasizes the importance of core assessment principles like reliability, validity, and fairness. It serves as a resource for promoting good practice and further research in language testing and assessment.