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The Rasch model, named after Georg Rasch, is a psychometric model for analyzing categorical data, such as answers to questions on a reading assessment or questionnaire responses, as a function of the trade-off between the respondent's abilities, attitudes, or personality traits, and the item difficulty.
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 .
Each clinical scale (except Alcohol Problems and Drug Problems) represents a particular trait, and each scale has sub-scales that represent more specific aspects of that trait. Somatic concerns (SOM) measures a respondent's physical concerns and complaints. Anxiety (ANX) measures a respondent's general feelings of tension, worry, and nervousness.
The two forms of anxiety are separated in the inventory, and both are given their own 20 separate questions. When participants rate themselves on these questions, they are given a 4-point frequency scale. The frequency scales differ between the two types of anxiety. There are two main forms of the Inventory, Form X and Form Y. [5]
However, by convention Likert items tend to be assigned progressive positive integer values. Likert scales typically range from 2 to 10 – with 3, 5, or, 7 being the most common. [14] Further, this progressive structure of the scale is such that each successive Likert item is treated as indicating a 'better' response than the preceding value.
The Wender Utah Rating Scale (WURS) is a psychological assessment tool used to help diagnose attention deficit hyperactivity disorder (ADHD) in adults. It is a self-report questionnaire that asks individuals to retrospectively recall and rate the frequency and severity of symptoms they experienced during childhood that are characteristic of ADHD.
Percentile ranks are not on an equal-interval scale; that is, the difference between any two scores is not the same as between any other two scores whose difference in percentile ranks is the same. For example, 50 − 25 = 25 is not the same distance as 60 − 35 = 25 because of the bell-curve shape of the distribution. Some percentile ranks ...
The Clinical Dementia Rating or CDR is a numeric scale used to quantify the severity of symptoms of dementia ... Statistics; Cookie statement; Mobile view; Search.