Past perspectives and new opportunities for the explanatory item response model
Journal article
Petscher, Yaacov, Compton, Donald, Steacy, Laura M. and Kinnon, Hannah. (2020). Past perspectives and new opportunities for the explanatory item response model. Annals of Dyslexia : an interdisciplinary journal of specific language disability. 70(2), pp. 160-179. https://doi.org/10.1007/s11881-020-00204-y
Authors | Petscher, Yaacov, Compton, Donald, Steacy, Laura M. and Kinnon, Hannah |
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Abstract | Models of word reading that simultaneously take into account item-level and person-level fixed and random effects are broadly known as explanatory item response models (EIRM). Although many variants of the EIRM are available, the field has generally focused on the doubly explanatory model for modeling individual differences on item responses. Moreover, the historical application of the EIRM has been a Rasch version of the model where the item discrimination values are fixed at 1.0 and the random or fixed item effects only pertain to the item difficulties. The statistical literature has advanced to allow for more robust testing of observed or latent outcomes, as well as more flexible parameterizations of the EIRM. The purpose of the present study was to compare four types of Rasch-based EIRMs (i.e., doubly descriptive, person explanatory, item explanatory, doubly explanatory) and more broadly compare Rasch and 2PL EIRM when including person-level and item-level predictors. Results showed that not only was the error variance smaller in the unconditional 2PL EIRM compared to the Rasch EIRM due to including the item discrimination random effect, but that patterns of unique item-level explanatory variables differ between the two approaches. Results are interpreted within the context of what each statistical model affords to the opportunity for describing and explaining differences in word-level performance. |
Keywords | Crossed random effects; Explanatory item response model; Reading; 2pl IRT |
Year | 01 Jan 2020 |
Journal | Annals of Dyslexia : an interdisciplinary journal of specific language disability |
Journal citation | 70 (2), pp. 160-179 |
Publisher | Springer |
ISSN | 0736-9387 |
Digital Object Identifier (DOI) | https://doi.org/10.1007/s11881-020-00204-y |
Web address (URL) | https://link.springer.com/article/10.1007/s11881-020-00204-y |
Open access | Published as non-open access |
Research or scholarly | Research |
Page range | 160-179 |
Publisher's version | License All rights reserved File Access Level Controlled |
Output status | Published |
Publication dates | |
Online | 29 Jul 2020 |
Publication process dates | |
Accepted | 13 Jul 2020 |
Deposited | 31 Jul 2024 |
Additional information | © The International Dyslexia Association 2020 |
Place of publication | United States |
https://acuresearchbank.acu.edu.au/item/90vxx/past-perspectives-and-new-opportunities-for-the-explanatory-item-response-model
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