This accessible book outlines the key ingredients of psychological assessment and provides case studies to illustrate their application, making this an ideal textbook for courses on psychometrics or psychological assessment. The book covers the nature of assessment, basic components, how tests are made, underlying statistics, reliability and validity, assessment of intelligence, abilities and personality, non-psychometric approaches, as well as ethical and professional issues and modern developments. A final chapter explains how readers can construct their own tests. Wide-ranging case studies demonstrate the variety of contexts in which assessment is conducted. The author's clarity of writing and use of practical examples throughout helps students apply these methods in practice with confidence as part of their studies on an array of courses.