ANS acuity improves throughout development, from w = 0.525 at age 3 to w = 0.179 at age 6 and w = 0.108 in adulthood¶
Claim · All claims
Evidence · 1 study · theoreticalr3·q2
Currency · newest study 2011 · not yet checked against its sources · not reviewed by a person · overdue for a recheck since 2016: baselines and conditions change
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.
q2 i? Number acuity (indexed by w) improves with age, and the article proposes this refinement may be stimulated by manipulation of exact numbers rather than only brain maturation. → Noël M-P and Rousselle L 2011
Evidence¶
Noël M-P and Rousselle L 2011¶
Noël M-P and Rousselle L (2011) Developmental changes in the profiles of dyscalculia: an explanation based on a double exact-and-approximate number representation model. Front. Hum. Neurosci. 5:165. https://doi.org/10.3389/fnhum.2011.00165
q2 · i? · theoretical · r3
The review reports developmental change in ANS acuity, citing Halberda and Feigenson (2008) for the w values at ages 3, 6, and adulthood. The article offers two candidate explanations — natural brain maturation or stimulation by exact-number processing — without adjudicating between them.
"change in number acuity are seen throughout the child's development (going from a w = 0.525 at age 3 to a w = 0.179 at age 6) up to adulthood ( w = 0.108, Halberda and Feigenson, 2008)"
Discussion¶
Related Claims¶
- Female preschoolers showed significantly better ANS acuity than males at Session 5, and knower level increased significantly with age — related
- Children's knower level of verbal number words is cross-sectionally associated with ANS acuity even after controlling for age and sex — related
- ANS acuity (w) did not significantly improve within children over the six-month period in the session-level analysis, though a hierarchical linear model detected a linear increase in percent correct — related
- ANS acuity correlates with later number sets fluency but does not emerge as a unique predictor once symbolic knowledge is controlled — related
- The authors hypothesize DD children's first deficit is dysfunction in building the exact representation of symbolic numbers, with reduced ANS acuity as a consequence rather than a cause — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
ans-acuity-improves-throughout-development |
title |
ANS acuity improves throughout development, from w = 0.525 at age 3 to w = 0.179 at age 6 and w = 0.108 in adulthood |
description |
ANS acuity improves throughout development, from w = 0.525 at age 3 to w = 0.179 at age 6 and w = 0.108 in adulthood |
status |
review |
evidence_strength |
weak |
newest_evidence |
2011 |
recheck_by |
2016 |
generated |
by process:wiki-ingest on 2026-10-17 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — noël-m-p-and-rousselle-l-2011 |
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