Claims

Higher starting scores in vocabulary predicted greater gains in matrix reasoning and vice versa (bidirectional positive coupling)

Claim · All claims
Evidence · 1 study · associational r2 · q3 · i2 medium
Currency · newest study 2017 · checked against its sources 2026-10-20 (automated, 1 of 1 entry) · 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 the rigour judged within that kind: what each code means.

This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.

q3 i2 Both coupling parameters in the mutualism model were positive: Time 1 Vocabulary predicted Matrix Reasoning gains (r = .203) and Time 1 Matrix Reasoning predicted Vocabulary gains (r = .144). → Kievit 2017

Evidence

Kievit 2017

Kievit, R. A., Lindenberger, U., Goodyer, I. M., Jones, P. B., Fonagy, P., Bullmore, E. T., the Neuroscience in Psychiatry Network, & Dolan, R. J. (2017). Mutualistic Coupling Between Vocabulary and Reasoning Supports Cognitive Development During Late Adolescence and Early Adulthood. Psychological Science. https://doi.org/10.1177/0956797617710785

q3 · i2 · associational · r2

Parameter estimates from the fitted mutualism LCS model in the Results section of the two-wave cohort study. The Vocabulary-to-Matrix-Reasoning coupling was "of typical size (r = .203, r2 = 4.1%)" and the reverse coupling was r = .144, r2 = 2.1%, in the small to typical range.

"Crucially, as predicted by the mutualism model, both coupling parameters were positive: Individuals who started out with a higher Matrix Reasoning score improved more on Vocabulary and vice versa."

Discussion

Page metadata
Field Value
type claim
id bidirectional-coupling-vocabulary-reasoning-gains
title Higher starting scores in vocabulary predicted greater gains in matrix reasoning and vice versa (bidirectional positive coupling)
description Higher starting scores in vocabulary predicted greater gains in matrix reasoning and vice versa (bidirectional positive coupling)
status review
evidence_strength moderate
newest_evidence 2017
source_checked 2026-10-20
generated by process:wiki-ingest on 2026-10-17
trust unverified — no one has confirmed this page's content
sources 1 — kievit-2017

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