Focusing on the conceptual understanding of psychometric issues such as validity and reliability this textbook introduces psychometric principles at a level that goes into more detail than introductory undergraduate texts but, that is more intuitive than more technical publications intended for postgraduate level. By emphasizing conceptual development and practical significance over mathematical proofs, this book assists students in appreciating how measurement problems can be addressed and why it is important to address them.

Índice: 1. Psychometrics and the Importance of Psychological Measurement Observable Behavior and Unobservable Attributes Psychological Tests: Definition and Types Psychometrics Challenges to Measurement in Psychology Theme: The Importance of Individual Differences 2. Scaling Fundamental Issues and Numbers Units of Measurement Additivity and Counting Four Scales of Measurement Summary Suggested Readings 3. Individual Differences and Correlations The Nature of Variability Importance of Individual Differences Variability and Distribution of Scores Distribution Shapes and Normal Distributions Quantifying the Associati... Etc.