Early ANS acuity does not predict later expressive vocabulary; only initial vocabulary size predicts vocabulary six months later¶
Claim · All claims
Evidence · 1 study · associationalr3·q3
Currency · newest study 2013 · 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
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 i? In model 2, initial expressive vocabulary was the only significant predictor of later vocabulary; ANS accuracy and RT were not significant predictors. → Libertus Melissa E. 2013
Evidence¶
Libertus Melissa E. 2013¶
Libertus Melissa E., Feigenson Lisa, Halberda Justin. (2013). Is Approximate Number Precision a Stable Predictor of Math Ability? Learning and Individual Differences. https://doi.org/10.1016/j.lindif.2013.02.001
q3 · i? · associational · r3
Longitudinal regression (model 2, Table 4) predicting Time 2 expressive vocabulary from Time 1 ANS accuracy, RT, TEMA-3, and vocabulary while controlling for age (R2 = 0.51, F(4,119) = 31.25, p < 0.001); the article reports "initial expressive vocabulary scores were the only significant predictor of later expressive vocabulary size" (partial r2 = 0.5, p < 0.001 for vocab).
"in model 2 initial expressive vocabulary scores were the only significant predictor of later expressive vocabulary size"
Discussion¶
Learner Variables¶
- Vocabulary — predictor: learners who differ on it differ in outcomes
Related Claims¶
- Early ANS acuity (accuracy and RT) uniquely predicts preschoolers' math ability six months later, controlling for initial math ability, age, and expressive vocabulary — related
- ANS acuity is a unique concurrent predictor of preschool math ability beyond expressive vocabulary, non-numerical attention RT, and memory span — related
- Processing speed at 19 months correlates with expressive vocabulary between 18 and 31 months, but processing speed at 25 and 31 months does not — related
- ANS acuity correlates with later number sets fluency but does not emerge as a unique predictor once symbolic knowledge is controlled — related
- Processing speed at 19 months does not significantly influence linear vocabulary growth between 19 and 30 months — related
- Faster processing speed at 19 months predicts faster syntactic growth between 19 and 30 months, controlling for concurrent vocabulary — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
ans-acuity-not-predicting-vocabulary-growth |
title |
Early ANS acuity does not predict later expressive vocabulary; only initial vocabulary size predicts vocabulary six months later |
description |
Early ANS acuity does not predict later expressive vocabulary; only initial vocabulary size predicts vocabulary six months later |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2013 |
generated |
by process:wiki-ingest on 2026-10-17 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — libertus-melissa-e-2013 |
Frontmatter is the page's machine-readable record — see the Schema & Guide.