pcIRT: An R Package for Polytomous and Continuous Rasch Models
A key task in psychological assessment is the scaling of new psychological tests and questionnaires. Item response theory (IRT) is a well-established framework for this area of research. At present, IRT comprises a great variety of models, but to date, relatively little attention has been paid to th...
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| Format: | Article |
| Language: | English |
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Foundation for Open Access Statistics
2018-04-01
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| Series: | Journal of Statistical Software |
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| Online Access: | https://www.jstatsoft.org/index.php/jss/article/view/2677 |
| _version_ | 1819263026093621248 |
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| author | Christine Hohensinn |
| author_facet | Christine Hohensinn |
| author_sort | Christine Hohensinn |
| collection | DOAJ |
| description | A key task in psychological assessment is the scaling of new psychological tests and questionnaires. Item response theory (IRT) is a well-established framework for this area of research. At present, IRT comprises a great variety of models, but to date, relatively little attention has been paid to the scaling of nominal and continuous data. The R package pcIRT provides functions for estimating IRT models for polytomous (nominal) and continuous data - the multidimensional polytomous Rasch model (Rasch 1961) and the continuous rating scale model (Müller 1987). Both models are extensions of the dichotomous logistic Rasch model (Rasch 1980) and retain its key feature of the separability of structural and nuisance parameters. The multidimensional polytomous Rasch model is suitable for nominal data under the assumption of a multidimensional space for the response categories, and the continuous rating scale model is a direct extension of the rating scale model developed by Andrich (1978) for continuous data. |
| first_indexed | 2024-12-23T20:07:02Z |
| format | Article |
| id | doaj.art-1f337befc0d04c2ca98c9e42e47b4da8 |
| institution | Directory Open Access Journal |
| issn | 1548-7660 |
| language | English |
| last_indexed | 2024-12-23T20:07:02Z |
| publishDate | 2018-04-01 |
| publisher | Foundation for Open Access Statistics |
| record_format | Article |
| series | Journal of Statistical Software |
| spelling | doaj.art-1f337befc0d04c2ca98c9e42e47b4da82022-12-21T17:32:55ZengFoundation for Open Access StatisticsJournal of Statistical Software1548-76602018-04-0184111410.18637/jss.v084.c021214pcIRT: An R Package for Polytomous and Continuous Rasch ModelsChristine HohensinnA key task in psychological assessment is the scaling of new psychological tests and questionnaires. Item response theory (IRT) is a well-established framework for this area of research. At present, IRT comprises a great variety of models, but to date, relatively little attention has been paid to the scaling of nominal and continuous data. The R package pcIRT provides functions for estimating IRT models for polytomous (nominal) and continuous data - the multidimensional polytomous Rasch model (Rasch 1961) and the continuous rating scale model (Müller 1987). Both models are extensions of the dichotomous logistic Rasch model (Rasch 1980) and retain its key feature of the separability of structural and nuisance parameters. The multidimensional polytomous Rasch model is suitable for nominal data under the assumption of a multidimensional space for the response categories, and the continuous rating scale model is a direct extension of the rating scale model developed by Andrich (1978) for continuous data.https://www.jstatsoft.org/index.php/jss/article/view/2677multidimensional polytomous Rasch modelcontinuous rating scale modelitem response theory |
| spellingShingle | Christine Hohensinn pcIRT: An R Package for Polytomous and Continuous Rasch Models Journal of Statistical Software multidimensional polytomous Rasch model continuous rating scale model item response theory |
| title | pcIRT: An R Package for Polytomous and Continuous Rasch Models |
| title_full | pcIRT: An R Package for Polytomous and Continuous Rasch Models |
| title_fullStr | pcIRT: An R Package for Polytomous and Continuous Rasch Models |
| title_full_unstemmed | pcIRT: An R Package for Polytomous and Continuous Rasch Models |
| title_short | pcIRT: An R Package for Polytomous and Continuous Rasch Models |
| title_sort | pcirt an r package for polytomous and continuous rasch models |
| topic | multidimensional polytomous Rasch model continuous rating scale model item response theory |
| url | https://www.jstatsoft.org/index.php/jss/article/view/2677 |
| work_keys_str_mv | AT christinehohensinn pcirtanrpackageforpolytomousandcontinuousraschmodels |