<Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> Psychometrics is a field of study concerned with the theory and technique of psychological measurement . As defined by National Council on Measurement in Education (NCME), psychometrics refers to psychological measurement . Generally, it refers to the field in psychology and education that is devoted to testing, measurement, assessment, and related activities . </P> <P> The field is concerned with the objective measurement of skills and knowledge, abilities, attitudes, personality traits, and educational achievement . Some psychometric researchers focus on the construction and validation of assessment instruments such as questionnaires, tests, raters' judgments, and personality tests . Others focus on research relating to measurement theory (e.g., item response theory; intraclass correlation). </P>

Which of the following terms has no meaning in association with psychometrics