Effects of Multidimensionality on IRT Item Characteristics and True Score Estimates: Implications for Computerized Test Assembly. Computerized Testing Report. LSAC Research Report Series.
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| Title: | Effects of Multidimensionality on IRT Item Characteristics and True Score Estimates: Implications for Computerized Test Assembly. Computerized Testing Report. LSAC Research Report Series. |
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| Language: | English |
| Authors: | Wang, Xiang-Bo, Harris, Vincent, Roussos, Louis, Law School Admission Council, Newtown, PA. |
| Peer Reviewed: | N |
| Page Count: | 23 |
| Publication Date: | 2002 |
| Document Type: | Numerical/Quantitative Data Reports - Research |
| Descriptors: | Ability, College Entrance Examinations, Computer Assisted Testing, Estimation (Mathematics), Item Response Theory, Law Schools, Test Construction, Test Items, True Scores |
| Assessment and Survey Identifiers: | Law School Admission Test |
| Abstract: | Multidimensionality is known to affect the accuracy of item parameter and ability estimations, which subsequently influences the computation of item characteristic curves (ICCs) and true scores. By judiciously combining sections of a Law School Admission Test (LSAT), 11 sections of varying degrees of uni- and multidimensional structures are used to assess the impact of multidimensionality on ICCs and true scores. This combination makes an artificial test for analysis purposes. It was found that multidimensionality decreased item slopes and estimated true score curves. The effect is shown to be bigger in the high ability range than in the low ability range. (Contains 23 figures and 21 references.) (Author/SLD) |
| Entry Date: | 2003 |
| Accession Number: | ED469184 |
| Database: | ERIC |
| FullText | Text: Availability: 0 CustomLinks: – Url: https://eric.ed.gov/contentdelivery/servlet/ERICServlet?accno=ED469184 Name: ERIC Full Text Category: fullText Text: Full Text from ERIC |
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| Header | DbId: eric DbLabel: ERIC An: ED469184 AccessLevel: 3 PubType: Electronic Resource PubTypeId: electronicResource PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Effects of Multidimensionality on IRT Item Characteristics and True Score Estimates: Implications for Computerized Test Assembly. Computerized Testing Report. LSAC Research Report Series. – Name: Language Label: Language Group: Lang Data: English – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Wang%2C+Xiang-Bo%22">Wang, Xiang-Bo</searchLink><br /><searchLink fieldCode="AR" term="%22Harris%2C+Vincent%22">Harris, Vincent</searchLink><br /><searchLink fieldCode="AR" term="%22Roussos%2C+Louis%22">Roussos, Louis</searchLink><br /><searchLink fieldCode="AR" term="%22Law+School+Admission+Council%2C+Newtown%2C+PA%2E%22">Law School Admission Council, Newtown, PA.</searchLink> – Name: PeerReviewed Label: Peer Reviewed Group: SrcInfo Data: N – Name: Pages Label: Page Count Group: Src Data: 23 – Name: DatePubCY Label: Publication Date Group: Date Data: 2002 – Name: TypeDocument Label: Document Type Group: TypDoc Data: Numerical/Quantitative Data<br />Reports - Research – Name: Subject Label: Descriptors Group: Su Data: <searchLink fieldCode="DE" term="%22Ability%22">Ability</searchLink><br /><searchLink fieldCode="DE" term="%22College+Entrance+Examinations%22">College Entrance Examinations</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+Assisted+Testing%22">Computer Assisted Testing</searchLink><br /><searchLink fieldCode="DE" term="%22Estimation+%28Mathematics%29%22">Estimation (Mathematics)</searchLink><br /><searchLink fieldCode="DE" term="%22Item+Response+Theory%22">Item Response Theory</searchLink><br /><searchLink fieldCode="DE" term="%22Law+Schools%22">Law Schools</searchLink><br /><searchLink fieldCode="DE" term="%22Test+Construction%22">Test Construction</searchLink><br /><searchLink fieldCode="DE" term="%22Test+Items%22">Test Items</searchLink><br /><searchLink fieldCode="DE" term="%22True+Scores%22">True Scores</searchLink> – Name: SubjectThesaurus Label: Assessment and Survey Identifiers Group: Su Data: <searchLink fieldCode="SU" term="%22Law+School+Admission+Test%22">Law School Admission Test</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Multidimensionality is known to affect the accuracy of item parameter and ability estimations, which subsequently influences the computation of item characteristic curves (ICCs) and true scores. By judiciously combining sections of a Law School Admission Test (LSAT), 11 sections of varying degrees of uni- and multidimensional structures are used to assess the impact of multidimensionality on ICCs and true scores. This combination makes an artificial test for analysis purposes. It was found that multidimensionality decreased item slopes and estimated true score curves. The effect is shown to be bigger in the high ability range than in the low ability range. (Contains 23 figures and 21 references.) (Author/SLD) – Name: DateEntry Label: Entry Date Group: Date Data: 2003 – Name: AN Label: Accession Number Group: ID Data: ED469184 |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=eric&AN=ED469184 |
| RecordInfo | BibRecord: BibEntity: Languages: – Text: English PhysicalDescription: Pagination: PageCount: 23 Subjects: – SubjectFull: Ability Type: general – SubjectFull: College Entrance Examinations Type: general – SubjectFull: Computer Assisted Testing Type: general – SubjectFull: Estimation (Mathematics) Type: general – SubjectFull: Item Response Theory Type: general – SubjectFull: Law Schools Type: general – SubjectFull: Test Construction Type: general – SubjectFull: Test Items Type: general – SubjectFull: True Scores Type: general – SubjectFull: Law School Admission Test Type: general Titles: – TitleFull: Effects of Multidimensionality on IRT Item Characteristics and True Score Estimates: Implications for Computerized Test Assembly. Computerized Testing Report. LSAC Research Report Series. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Law School Admission Council, Newtown, PA. – PersonEntity: Name: NameFull: Wang, Xiang-Bo – PersonEntity: Name: NameFull: Harris, Vincent – PersonEntity: Name: NameFull: Roussos, Louis IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 07 Type: published Y: 2002 |
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