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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.
A rating scale is a set of categories designed to obtain information about a quantitative or a qualitative attribute. In the social sciences , particularly psychology , common examples are the Likert response scale and 0-10 rating scales, where a person selects the number that reflecting the perceived quality of a product .
ADHD Rating Scale; Adult ADHD Self-Report Scale (ASRS v1.1) [2] Conners Comprehensive Behaviour Rating Scale; Disruptive Behavior Disorders Rating Scale; Swanson, Nolan and Pelham Teacher and Parent Rating Scale; Vanderbilt ADHD Diagnostic Rating Scale; Wender Utah Rating Scale
The first threshold of item i, , is the location on the continuum at which a person is equally likely to obtain a score of 0 or 1, the second threshold is the location at which a person is equally likely to obtain a score of 1 and 2, and so on. In the example shown in Figure 1, the threshold locations are −1.5, −0.5, 0.5, and 1.5 respectively.
The MOS is expressed as a single rational number, typically in the range 1–5, where 1 is lowest perceived quality, and 5 is the highest perceived quality. Other MOS ranges are also possible, depending on the rating scale that has been used in the underlying test.
Film critic Dave Kehr—who also uses a 0–4 star scale—believes "two stars is a borderline recommendation". [12] On a five-star scale, regardless of the bottom rating, 3 stars is often the lowest positive rating, though judging on a purely mathematical basis, 2 1/2 stars would be the dividing line between good and bad on a 0–5 scale.
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The Interagency Language Roundtable scale is a set of descriptions of abilities to communicate in a language. It is the standard grading scale for language proficiency in the United States 's federal-level service.