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A Likert scale (/ ˈ l ɪ k ər t / LIK-ərt, [1] [note 1]) is a psychometric scale named after its inventor, American social psychologist Rensis Likert, [2] which is commonly used in research questionnaires.
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 theory (e.g., item response theory, intraclass correlation) or specialize as learning and development professionals.
Level of measurement or scale of measure is a classification that describes the nature of information within the values assigned to variables. [1] Psychologist Stanley Smith Stevens developed the best-known classification with four levels, or scales, of measurement: nominal , ordinal , interval , and ratio .
The following diagnostic systems and rating scales are used in psychiatry and clinical psychology. This list is by no means exhaustive or complete. This list is by no means exhaustive or complete. For instance, in the category of depression, there are over two dozen depression rating scales that have been developed in the past eighty years.
Symptom and attitude tests are more often called scales. A useful psychological test/scale must be both valid, i.e., show evidence that the test or scale measures what it is purported to measure, [1] [4]) and reliable, i.e., show evidence of consistency across items and raters and over time, etc.
Likert scale, a psychometric measurement scale developed by Rensis Likert Likert's management systems , styles of management developed by Rensis Likert Topics referred to by the same term
The psychometrics are robust with the Chinese MMPI-2 having high reliability (a measure of whether the results of the scale are consistent). Reliability coefficients were found to be over 0.8 for the test in Hong Kong and were between 0.58 and 0.91 across scales for the mainland.
A depression rating scale is a psychometric instrument ... Measurement, 4(3), 135–155. See also. Center for Epidemiological Studies Depression Scale (CES-D)