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- Item_response_theory abstract "In psychometrics, item response theory (IRT) also known as latent trait theory, strong true score theory, or modern mental test theory, is a paradigm for the design, analysis, and scoring of tests, questionnaires, and similar instruments measuring abilities, attitudes, or other variables. Unlike simpler alternatives for creating scales evaluating questionnaire responses it does not assume that each item is equally difficult. This distinguishes IRT from, for instance, the assumption in Likert scaling that "All items are assumed to be replications of each other or in other words items are considered to be parallel instruments" (p. 197). By contrast, item response theory treats the difficulty of each item (the ICCs) as information to be incorporated in scaling items. ICC stands for item characteristic curve.It is based on the application of related mathematical models to testing data. Because it is generally regarded as superior to classical test theory, it is the preferred method for developing scales in the United States, especially when optimal decisions are demanded, as in so-called high-stakes tests, e.g., the Graduate Record Examination (GRE) and Graduate Management Admission Test (GMAT).The name item response theory is due to the focus of the theory on the item, as opposed to the test-level focus of classical test theory. Thus IRT models the response of each examinee of a given ability to each item in the test. The term item is generic: covering all kinds of informative item. They might be multiple choice questions that have incorrect and correct responses, but are also commonly statements on questionnaires that allow respondents to indicate level of agreement (a rating or Likert scale), or patient symptoms scored as present/absent, or diagnostic information in complex systems.IRT is based on the idea that the probability of a correct/keyed response to an item is a mathematical function of person and item parameters. The person parameter is construed as (usually) a single latent trait or dimension. Examples include general intelligence or the strength of an attitude. Parameters on which items are characterized include their difficulty (known as "location" for their location on the difficulty range), discrimination (slope or correlation) representing how steeply the rate of success of individuals varies with their ability, and a pseudoguessing parameter, characterising the (lower) asymptote at which even the least able persons will score due to guessing (for instance, 25% for pure chance on a multiple choice item with four possible responses).".
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- Item_response_theory wikiPageExternalLink Psychometrics.html.
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- Item_response_theory wikiPageExternalLink IRT.pdf.
- Item_response_theory wikiPageExternalLink lta.htm.
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- Item_response_theory wikiPageExternalLink www.rasch-analysis.com.
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- Item_response_theory wikiPageWikiLink Accuracy.
- Item_response_theory wikiPageWikiLink Accuracy_and_precision.
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- Item_response_theory wikiPageWikiLink Asymptote.
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- Item_response_theory wikiPageWikiLink Category:Comparison_of_assessments.
- Item_response_theory wikiPageWikiLink Category:Educational_assessment_and_evaluation.
- Item_response_theory wikiPageWikiLink Category:Latent_variable_models.
- Item_response_theory wikiPageWikiLink Category:Psychometrics.
- Item_response_theory wikiPageWikiLink Category:Statistical_models.
- Item_response_theory wikiPageWikiLink Certification.
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- Item_response_theory wikiPageWikiLink Classical_test_theory.
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- Item_response_theory wikiPageWikiLink Confirmation_bias.
- Item_response_theory wikiPageWikiLink Correlation.
- Item_response_theory wikiPageWikiLink Correlation_and_dependence.
- Item_response_theory wikiPageWikiLink Cronbachs_alpha.
- Item_response_theory wikiPageWikiLink Cumulative_distribution_function.
- Item_response_theory wikiPageWikiLink Cumulative_normal.
- Item_response_theory wikiPageWikiLink Data.
- Item_response_theory wikiPageWikiLink David_Andrich.
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- Item_response_theory wikiPageWikiLink Equating.
- Item_response_theory wikiPageWikiLink Factor_analysis.
- Item_response_theory wikiPageWikiLink Fisher_information.
- Item_response_theory wikiPageWikiLink Frederic_M._Lord.
- Item_response_theory wikiPageWikiLink Function_(mathematics).
- Item_response_theory wikiPageWikiLink Georg_Rasch.
- Item_response_theory wikiPageWikiLink Google_Books.
- Item_response_theory wikiPageWikiLink Graduate_Management_Admission_Test.
- Item_response_theory wikiPageWikiLink Graduate_Record_Examination.
- Item_response_theory wikiPageWikiLink Graduate_Record_Examinations.
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- Item_response_theory wikiPageWikiLink Intelligence.
- Item_response_theory wikiPageWikiLink Likert_scale.
- Item_response_theory wikiPageWikiLink Likert_scaling.
- Item_response_theory wikiPageWikiLink Local_independence.
- Item_response_theory wikiPageWikiLink Logistic_function.
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- Item_response_theory wikiPageWikiLink Measurement.
- Item_response_theory wikiPageWikiLink Measurement_error.
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- Item_response_theory wikiPageWikiLink Newton-Raphson.
- Item_response_theory wikiPageWikiLink Newtons_method.
- Item_response_theory wikiPageWikiLink Normal_distribution.
- Item_response_theory wikiPageWikiLink Observational_error.
- Item_response_theory wikiPageWikiLink Odds.
- Item_response_theory wikiPageWikiLink Ogive.
- Item_response_theory wikiPageWikiLink Orthogonal.
- Item_response_theory wikiPageWikiLink Orthogonality.
- Item_response_theory wikiPageWikiLink Parameter.
- Item_response_theory wikiPageWikiLink Parameters.
- Item_response_theory wikiPageWikiLink Paul_Lazarsfeld.
- Item_response_theory wikiPageWikiLink Pearsons_chi-squared_test.
- Item_response_theory wikiPageWikiLink Person-fit_analysis.
- Item_response_theory wikiPageWikiLink Personal_computer.
- Item_response_theory wikiPageWikiLink Point-biserial_correlation_coefficient.
- Item_response_theory wikiPageWikiLink Probability.
- Item_response_theory wikiPageWikiLink Psychometrics.
- Item_response_theory wikiPageWikiLink Questionnaire.
- Item_response_theory wikiPageWikiLink Rasch_model.
- Item_response_theory wikiPageWikiLink Rating_scale.
- Item_response_theory wikiPageWikiLink Reliability_(psychometric).