Understanding Psychological Assessment presents a comprehensive overview of the history of psychological assessment and its domains of application. It gives a realistic account of how psychological theory, measurement, and instruments can help the practitioner in understanding, explaining, and predicting a client's problem or question. Using a systematic framework, it also reflects on the history, needs, methods, and consequences of psycho-diagnosis. Using this book as a guide, the practitioners and the students will be able to conduct a comprehensive assessment of the client.