Cascade models in which IQ mediates the WM-to-achievement path fit comparably to, but not significantly better than, the original correlated models¶
Claim · All claims
Evidence · 1 study · associationalr2·q2
Currency · newest study 2017 · not yet checked against its sources · not reviewed by a person
Subclaims¶
Reading the evidence codes
q is the design tier, i the impact, n the sample, and the kind with its r
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q2 i? Alternative cascade SEM models with IQ mediating between WM and achievement showed slightly worse but comparable fit indices, with WM strongly predicting IQ. → Schneider Wolfgang 2017
Evidence¶
Schneider Wolfgang 2017¶
Schneider Wolfgang, Niklas Frank. (2017). Intelligence and Verbal Short-Term Memory/Working Memory: Their Interrelationships from Childhood to Young Adulthood and Their Impact on Academic Achievement. Journal of Intelligence. https://doi.org/10.3390/jintelligence5020026
q2 · i? · associational · r2
Final analytic step of the LOGIC reanalysis: correlations between WM and IQ latent variables were replaced by paths predicting IQ from WM in all three SEM models. The article reports the cascade models' fit was "slightly worse, but comparable" and that IQ mediated WM's impact.
"Fit indices for all three alternative Models 1a, 2a, and 3a were slightly worse, but comparable to the original Models 1, 2 and 3, and WM acted as a strong predictor of IQ."
Discussion¶
Related Claims¶
- Results provide no support for the IQ-achievement discrepancy model of dyslexia; non-verbal IQ correlated with all Year-1 language measures — related
- Higher working memory capacity was associated with better final test performance on advanced materials — related
- Previous domain knowledge accounts for most of the variance in later achievement, considerably reducing the predictive impact of IQ and WM — related
- Math anxiety has both a direct negative effect and a WM-mediated indirect effect on children's verbal Math Reasoning, but only an indirect effect on Numerical Operations — related
- Working memory fully mediates the effects of math anxiety and attention on children's non-verbal Numerical Operations — related
- In a cross-sectional model, attention problems relate to both non-verbal and verbal math performance only indirectly, through working memory (and, for MR, reading) — related
- Working memory capacity is a robust indicator of success or failure in language learning — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
cascade-model-iq-mediation-comparable-fit |
title |
Cascade models in which IQ mediates the WM-to-achievement path fit comparably to, but not significantly better than, the original correlated models |
description |
Cascade models in which IQ mediates the WM-to-achievement path fit comparably to, but not significantly better than, the original correlated models |
status |
review |
evidence_strength |
weak |
newest_evidence |
2017 |
generated |
by process:wiki-ingest on 2026-10-16 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — schneider-wolfgang-2017 |
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