Psychometrics
Psychometrics is the field of study within psychology concerned with a conviction as alive as technique of measurement. Psychometrics generally talked to specialized fields within psychology as alive as education devoted to testing, measurement, assessment, & related activities. Psychometrics is concerned with a objective measurement of latent constructs that cannot be directly observed. Examples of latent constructs increase intelligence, introversion, mental disorders, as well as educational achievement. The levels of individuals on nonobservable latent variables are inferred through mathematical modeling based on what is observed from individuals' responses to items on tests and scales.
Practitioners are intended as psychometricians, although not all who engage in psychometric research go by this title. Psychometricians usually possess a particular qualification such as degrees or certifications, and nearly are psychologists with modern graduate training in psychometrics and measurement theory. In addition to traditional, academic institutions, practitioners also hold for organizations such(a) as the Educational Testing Service and Psychological Corporation. Some psychometric researchers focus on the construction and validation of assessment instruments including surveys, scales, and open- or close-ended questionnaires. Others focus on research relating to measurement image e.g., item response theory; intraclass correlation or specialize as learning and development professionals.