PURPOSE: This study investigated the feasibility and potential validity of an item response theory (IRT)-based computerized adaptive testing (CAT) version of the MacArthur-Bates Communicative Development Inventory: Words & Sentences (CDI:WS; Fenson et al., 2007) vocabulary checklist, with the objective of reducing length while maintaining measurement precision. METHOD: Parent-reported vocabulary for the American CDI:WS norming sample consisting of 1,461 children between the ages of 16 and 30 months was used to investigate the fit of the items to the 2-parameter logistic IRT model and to simulate CDI-CAT versions with 400, 200, 100, 50, 25, 10, and 5 items. RESULTS: All but 14 items fit the 2-parameter logistic IRT model, and real data simulations of CDI-CATs with at least 50 items recovered full CDI scores with correlations over .95. Furthermore, the CDI-CATs with at least 50 items had similar correlations with age and socioeconomic status as the full CDI:WS. CONCLUSION: These results provide strong evidence that a CAT version of the CDI:WS has the potential to reduce length while maintaining the accuracy and precision of the full instrument.
PURPOSE: This study investigated the feasibility and potential validity of an item response theory (IRT)-based computerized adaptive testing (CAT) version of the MacArthur-Bates Communicative Development Inventory: Words & Sentences (CDI:WS; Fenson et al., 2007) vocabulary checklist, with the objective of reducing length while maintaining measurement precision. METHOD: Parent-reported vocabulary for the American CDI:WS norming sample consisting of 1,461 children between the ages of 16 and 30 months was used to investigate the fit of the items to the 2-parameter logistic IRT model and to simulate CDI-CAT versions with 400, 200, 100, 50, 25, 10, and 5 items. RESULTS: All but 14 items fit the 2-parameter logistic IRT model, and real data simulations of CDI-CATs with at least 50 items recovered full CDI scores with correlations over .95. Furthermore, the CDI-CATs with at least 50 items had similar correlations with age and socioeconomic status as the full CDI:WS. CONCLUSION: These results provide strong evidence that a CAT version of the CDI:WS has the potential to reduce length while maintaining the accuracy and precision of the full instrument.
Authors: William D Hula; Gerasimos Fergadiotis; Alexander M Swiderski; JoAnn P Silkes; Stacey Kellough Journal: J Speech Lang Hear Res Date: 2019-12-18 Impact factor: 2.297
Authors: Raymond Sturner; Barbara Howard; Paul Bergmann; Tanya Morrel; Rebecca Landa; Kejuana Walton; Danielle Marks Journal: J Autism Dev Disord Date: 2017-10
Authors: Karolina Mieszkowska; Grzegorz Krajewski; Krzysztof Sobota; Agnieszka Dynak; Joanna Kolak; Magdalena Krysztofiak; Barbara Łukomska; Magdalena Łuniewska; Nina Gram Garmann; Pernille Hansen; Anna Sara Hexeberg Romøren; Hanne Gram Simonsen; Katie Alcock; Napoleon Katsos; Ewa Haman Journal: Int J Environ Res Public Health Date: 2022-03-05 Impact factor: 3.390