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Author: Osterlind, Steven J.
Resulting in 2 citations.
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Beaujean, A. Alexander Osterlind, Steven J. |
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Using Item Response Theory to Assess the Flynn Effect in the National Longitudinal Study of Youth 79 Children and Young Adults Data Intelligence 36,5 (September-October 2008): 455-463. Also: http://www.sciencedirect.com/science/article/pii/S0160289607001304 Cohort(s): Children of the NLSY79 Publisher: Elsevier Keyword(s): Flynn Effect; I.Q.; Intelligence Tests; Peabody Individual Achievement Test (PIAT- Math); Peabody Picture Vocabulary Test (PPVT); Test Scores/Test theory/IRT The purpose of this manuscript is to assess the magnitude of the Flynn Effect (i.e., increase in mean IQ scores across time) using Item Response Theory (IRT). Unlike using methods derived from Classical Test Theory, IRT has the capability to determine if the Flynn Effect is due to a genuine increase in intelligence, if it is due to a psychometric artifact (i.e., items changing properties over time), or a combination of the two. Using the Peabody Picture Vocabulary Test—Revised and Peabody Individual Achievement Test—Math from the National Longitudinal Study of Youth 79 Children and Young Adults, the results of this study indicate that while using raw and standardized scores, the Flynn Effect is evident in a predicted magnitude, but when using scores based from IRT analysis, the magnitude Flynn Effect substantially decreases, and, at least for the Peabody Picture Vocabulary Test—Revised, goes away. Thus, for the data used in this study, the Flynn Effect appears to be largely the result of changing item properties instead of changes in cognitive ability. |
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Bibliography Citation
Beaujean, A. Alexander and Steven J. Osterlind. "Using Item Response Theory to Assess the Flynn Effect in the National Longitudinal Study of Youth 79 Children and Young Adults Data." Intelligence 36,5 (September-October 2008): 455-463.
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Beaujean, A. Alexander Osterlind, Steven J. |
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Using Item Response Theory to Assess the Lynn-Flynn Effect Working Paper, Department of Educational Psychology, Baylor University, 2006 Cohort(s): Children of the NLSY79, NLSY79 Young Adult Publisher: Department of Educational Psychology, Baylor University Keyword(s): Flynn Effect; I.Q.; Intelligence Tests; Peabody Picture Vocabulary Test (PPVT); Test Scores/Test theory/IRT Permission to reprint the abstract has not been received from the publisher. The purpose of this manuscript is to demonstrate the use of Item Response Theory (IRT) methods in determining if the increase in mean IQ scores across time (i.e., the Lynn-Flynn Effect[LFE]) is due to an increase in intelligence, or if it is due to a psychometric artifact. This manuscript demonstrated the use of IRT in assessing the existence of the LFE using cohort data from both the Mathematics section of the College Basic Academic Subjects Examination (CBASE) and the Peabody Picture Vocabulary Test-Revised (PPVT-R) from the NLSY79 Children and Young Adults. |
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Bibliography Citation
Beaujean, A. Alexander and Steven J. Osterlind. "Using Item Response Theory to Assess the Lynn-Flynn Effect." Working Paper, Department of Educational Psychology, Baylor University, 2006. |