Behaviour Therapy is based on the application of principles of learning to change human behaviour. In the last two decades it has grown into a promising scientific discipline. This development is exemplified by extensive research and applications. The present book provides a unifying account of its contemporary developments, linking underlying theories with practice. This book is divided into three sections. In the first section, basic assumptions of behaviour therapy are examined and emerging trends such as radical behaviourism, cognitive behaviourism and systematic eclectism are dealt with in a systematic manner. In the second section, the techniques of behaviour therapy, their theoretical bases and applications have been illustrated with the help of empirical studies. The concluding section focuses on the contemporary issues of research and practice of behaviour therapy.