noun plural but singular in construction\-ˈme-triks\(Medical Dictionary)
Medical Definition of PSYCHOMETRICS
: a branch of clinical or applied psychology dealing with the use and application of mental measurement
: the technique of mental measurements : the use of quantitative devices for assessing psychological trends
Science of psychological measurement. Psychometricians design and administer psychological tests (seepsychological testing), both to generate empirical data on mental processes and to refine their understanding of measurement techniques and the statistical analysis of results. Major concerns include test reliability and validity and the norming or standardization of results.