This collection provides a timely and provocative survey of current works in mathematical psychology in the style of Clyde Coombs, remembered by his fellow psychologists and other social scientists for his seminal contributions to the analysis of qualitative measurement and multidimensional scaling, and for his innovative models of conflict and choice. Each essay illustrates the contin- uing influence of Coombs's work and approach to the application of mathematics and basic psychological phenomena. TOC:Contents: From Indices to Mappings: The Representational Approach to Measurement.- Social Dilemmas, Economic Self-Interest, and Evolutionary Theory.- Probabilistic Dimensionality: A Study of Confidence and Intention.- Judgements of Relative Importance in Decision Making: The Importance of Interpretation and the Interpretation of Importance.- Validating the Dimensional Structure of Psychological Spaces: Applications to Personality and Emotions.- The Disparity Between Willingness-to-Pay Versus Willingness-to-Accept as a Framing Effect.- Rapid Aimed Movements and Speed-Accuracy Trade Off: Optimal Strategies.