Psychometrics, Overview

Abstract

Psychometrics includes educational testing, measurement of attitudes and perceptions, personality testing, opinion surveys, health inventories, and other forms of psychological measurement. Psychometric techniques created for measuring the human mind have also proven useful in biometrics and other fields that deal with measuring the intangible. This article is a comprehensive summary of the techniques for psychometric analysis including reliability, generalizability, and validity assessments. The article also presents the evolution of psychometric theory, popular measurement models, and a snapshot of new directions in the field.

Standardization and UNDERSTANDardization in Educational Assessment

“…They found that people did not directly perceive the magnitude of physical differences until the difference hit some threshold—a “just noticeable difference,” as Weber termed it. Fechner later used these just noticeable differences to develop the first psychological scale of “sensation” (Sireci, Wainer, & Braun, 1998).…”