Classical Test Theory (CTT) Item Response Theory (IRT) and Differntial Item Functioning (DIF)
Classical test theory versus Rasch analysis for quality of life questionnaire reduction
... Background: Although health-related quality of life (HRQOL) instruments may offer satisfactory results, their length often limits the extent to which they are actually applied in clinical practice. Efforts to develop ...
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Theoretical and Practical Comparison of Classical Test Theory and Item-Response Theory
... Classical test theory and item response theory are widely perceived as representing two very different measurement frameworks. Few studies have empirically examined the similarities and ...
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Development and validation of the coronary heart disease scale under the system of quality of life instruments for chronic diseases QLICD-CHD: combinations of classical test theory and Generalizability theory
... Besides classical test theory analysis above, we also ap- plied Generalizability Theory (G theory) to investigate the score dependability of the ...G theory has been presented as ...
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Measuring the ICF components of impairment, activity limitation and participation restriction: an item analysis using classical test theory and item response theory
... The Classical Test Theory (CTT) approach to item analysis is based on correlational data and the procedures usually involve maximising Cronbach's alpha [12] and selecting items with high factor ...
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An Empirical Study on Assessment of Item-Person Statistics and Reliability Using Classical Test Theory Measurement Methods
... Recent developments in statistics and psychology supported an increase in quality of measurement in the educational area. The present study empirically examined the characteristics of item and person statistics of ...
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Recent proposals to estimate transient error within the classical test theory tradition
... of classical test theory (test- retest, parallel-forms with or without an extended interval, split- half, and coefficient alpha) are aimed at arriving at a reliability coefficient with no ...
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The nutrition for sport knowledge questionnaire (NSKQ): development and validation using classical test theory and Rasch analysis
... Additional file 1: Supplementary Material S1. Methods used for missing variables analysis. In the original design, the demographic questions were asked last; therefore, it was not possible to complete a full assessment ...
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Psychometric evaluation of the PROMIS® Depression Item Bank: an illustration of classical test theory methods
... to test specific sub- stantive hypotheses. For example, one could test whether the individual factor loadings can be constrained to equality to test the tenability of the tau equivalence as- ...
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Measuring the ICF components of impairment, activity limitation and participation restriction: an item analysis using classical test theory and item response theory
... a function of the slope i.e. the discrimination (a) and the location parameters (b) that indicate the items difficulty. In a polytomous model there is more than one location parameter. The number of location parameters ...
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Classical test theory and item response theory: Two understandings of one high stakes performance exam
... different test formats—may not be ...measuring test taker performance at different points in time (pre/ post); using different test forms which contain different items of different difficulty; or ...
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Comparing five depression measures in depressed Chinese patients using item response theory: an examination of item properties, measurement precision and score comparability
... response theory (IRT) [3] offers promising solu- tions to address issues that have been difficult to solve through classical methods, and recently, IRT has been in- creasingly applied to PRO ...with ...
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DEMQOL and DEMQOL-Proxy: a Rasch analysis
... Response Theory (IRT) [6, 7] and Rasch Measurement Theory (RMT) [8, 9] provide more stringent psychometric methods than traditional methods derived from Classical Test Theory ...
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State of the psychometric methods: comments on the ISOQOL SIG psychometric papers
... classical test theory (CTT) [1], item response theory (IRT) [2], and Rasch measurement theory (RMT) ...and test information functions are usually calculated in an IRT analyses ...
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Scoring Short Answer Questions of Five Borderline Medical Students
... A standard method used to obtain an overall score of a test or examination is to simply add the scores on the questions. This is based on a framework known as Classical Test Theory (CTT) [1]. ...
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Silva’s Management Competency Theory: A Factor-Item Analytic Approach Utilizing Oblique Rotation Direct Oblimin Method under Kaiser-Bartlett’s Test of Sphericity
... - Classical test theory is a body of psychometric conjecture that focuses on predicting the outcomes of psychological tests, to improve their reliability and ...Bartlett test of sphericity was ...
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Listening to patients: using verbal data in the validation of the Aberdeen Measures of Impairment, Activity Limitation and Participation Restriction (Ab IAP)
... as possible without contamination from the other con- structs within the ICF model. The items in the Ab-IAP were based on items from 13 existing osteoarthritis measures that had been judged to be only measuring a unique ...
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Modern psychometrics applied in rheumatology–A systematic review
... Statistical methods are essential for the development and evaluation of all outcome measures. By far, most health outcome measures have been developed using methods from classical test theory (CTT). ...
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The Development of the Short-form of “25-Question Geriatric Locomotive Function Scale”
... of classical test theory (CTT) and item response theory (IRT) analysis to study the psychometric properties of the French version of the quality of life enjoyment and satisfaction ...
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Psychometric properties of a Korean version of the Perceived Stress Scale (PSS) in a military sample
... Both classical test theory (CTT) and the Rasch rating scale model were used to examine the psychometric properties of the KPSS, including factor structure, concurrent validity, reliability, and item ...
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A Framework for the Appraisal of Economic Crises
... Milton Friedman admits that cycles can occur in a self-regulating system if workers are fooled as in not perceiving the price level accurately. Workers can have imperfect information say of price increases. Price ...
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