Monday, December 05, 2022

From MDPI: "Multidimensional Scaling of Cognitive Ability and Academic Achievement Scores" - Open Access….you can download and read for free!

I LOVE MDS and modern visual-graphic methods (e.g., psychometric network analysis) for analyzing multidimensional cognitive and achievement data

Multidimensional Scaling of Cognitive Ability and Academic Achievement ScoresMultidimensional scaling (MDS) was used as an alternate multivariate procedure for investigating intelligence and academic achievement test score correlations. Correlation coefficients among Wechsler Intelligence Scale for Children, Fifth Edition (WISC-5) and Wechsler Individual Achievement Test, Third Edition (WIAT-III) validity sample scores and among Kaufman Assessment Battery for Children, Second Edition (KABC-II) and Kaufman Test of Educational Achievement, Second Edition (KTEA-2) co-norming sample scores were analyzed using multidimensional scaling (MDS). Three-dimensional MDS configurations were the best fit for interpretation in both datasets. Subtests were more clearly organized by CHC ability and academic domain instead of complexity. Auditory-linguistic, figural-visual, reading-writing, and quantitative-numeric regions were visible in all models. Results were mostly similar across different grade levels. Additional analysis with WISC-V and WIAT-III tests showed that content (verbal, numeric, figural) and response process facets (verbal, manual, paper-pencil) were also useful in explaining test locations. Two implications from this study are that caution may be needed when interpreting fluency scores across academic areas, and MDS provides more empirically[...]

Kevin McGrew, PhD
Educational Psychologist
Director, Institute for Applied Psychometrics

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