This book traces how such a seemingly immutable idea as measurement proved so malleable when it collided with the subject matter of psychology. It locates philosophical and social influences reshaping the concept and, at the core of this reshaping, identifies a fundamental problem: the issue of whether psychological attributes really are quantitative. It argues that the idea of measurement now endorsed within psychology actually subverts attempts to establish a genuinely quantitative science and it urges a new direction. It relates views (...) on measurement by thinkers such as Holder, Russell, Campbell and Nagel to earlier views, like those of Euclid and Oresme. Within the history of psychology, it considers contributions by Fechner, Cattell, Thorndike, Stevens and Suppes, among others. It also contains a non-technical exposition of conjoint measurement theory and recent foundational work by leading measurement theorist R. Duncan Luce. (shrink)

Prologue: objectivity shock -- Epistemologies of the eye -- Blind sight -- Collective empiricism -- Objectivity is new -- Histories of the scientific self -- Epistemic virtues -- The argument -- Objectivity in shirtsleeves -- Truth-to-nature -- Before objectivity -- Taming nature's variability -- The idea in the observation -- Four-eyed sight -- Drawing from nature -- Truth-to-nature after objectivity -- Mechanical objectivity -- Seeing clear -- Photography as science and art -- Automatic images and blind sight -- Drawing against (...) photography -- Self-surveillance -- Ethics of objectivity -- The scientific self -- Why objectivity? -- The scientific subject -- Kant among the scientists -- Scientific personas -- Observation and attention -- Knower and knowledge -- Structural objectivity -- Objectivity without images -- The objective science of mind -- The real, the objective, and the communicable -- The color of subjectivity -- What even a god could not say -- Dreams of a neutral language -- The cosmic community -- Trained judgment -- The uneasiness of mechanical reproduction -- Accuracy should not be sacrificed to objectivity -- The art of judgment -- Practices and the scientific self -- Representation to presentation -- Seeing is being : truth, objectivity, and judgment -- Seeing is making : nanofacture -- Right depiction. (shrink)

Is it possible to measure psychological attributes like intelligence, personality and attitudes and if so, how does that work? What does the term 'measurement' mean in a psychological context? This fascinating and timely book discusses these questions and investigates the possible answers that can be given response. Denny Borsboom provides an in-depth treatment of the philosophical foundations of widely used measurement models in psychology. The theoretical status of classical test theory, latent variable theory and positioned in terms of the underlying (...) philosophy of science. Special attention is devoted to the central concept of test validity and future directions to improve the theory and practice of psychological measurement are outlined. (shrink)