This book provides an introduction to measurement theory for non-specialists.

Introduction; 1. Relations; 2. Fundamental Measurement, Derived Measurement, and the Uniqueness Problem; 3. Three Representation Problems: Ordinal, Extensive, and Difference Measurement; 4. Applications to Psychophysical Scaling; 5. Project Structures; 6. Nontransitive Indifference, Probabilistic Consistency, and Measurement without Numbers; 7. Decisionmaking under Risk or Uncertainty; 8. Subjective Probability.