The combined BSID-III subscales at 2 years explained 15% of the variation in WPPSI-III full-scale IQ at 4 years, 16% for Verbal IQ, and 7% for Performance IQ.
PLOS Global Public Health · 5 authors, 6 centres
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The combined BSID-III subscales at 2 years explained 15% of the variation in WPPSI-III full-scale IQ at 4 years, 16% for Verbal IQ, and 7% for Performance IQ.
The combined BSID-III subscales at 2 years explained 15% of the variation in WPPSI-III full-scale IQ at 4 years, 16% for Verbal IQ, and 7% for Performance IQ. In contrast, the BSID-III explained only 1% of the variation in the WISC-V Fluid Reasoning Index at 8 years. Analysis showed the predictive validity was higher in low-risk categories (e.g., non-stunted children) compared to high-risk categories. The authors conclude that BSID-III scores at 24 months should be used with caution to predict future intellectual abilities, especially in high-risk environments, and note limitations such as the absence of a full-scale IQ measure at age 8.