Individual differences in processing speed remain broadly stable between 19 and 31 months¶
Claim · All claims
Evidence · 1 study · associationalr2·q3
Currency · newest study 2019 · not yet checked against its sources · not reviewed by a person · overdue for a recheck since 2024: 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
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This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.
q3 i? Mean RTs correlated significantly between 19 and 25 months and between 19 and 31 months, but not between 25 and 31 months. → Michelle S. Peter 2019
Evidence¶
Michelle S. Peter 2019¶
Michelle S. Peter, Samantha Durrant, Andrew Jessop, Amy Bidgood, Julian M. Pine, Caroline F. Rowland. (2019). Does speed of processing or vocabulary size predict later language growth in toddlers? Cognitive Psychology 115 (2019) 101238. https://doi.org/10.1016/j.cogpsych.2019.101238
q3 · i? · associational · r2
Correlational analysis of mean RT scores per child across the three measurement points. The authors conclude that "individual differences in speed of language processing remained broadly stable between 19 and 31months", though the 25-to-31-month correlation was not significant.
"There was a significant correlation in mean RTs between 19 and 25months (r(68)=0.23,p=.029), and between 19 and 31months (r(69)=0.28, p=.009), indicating that fast processors at 19months continued to be fast processors six months later at 25months, and 12months later at 31months."
Discussion¶
Related Claims¶
- 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
- Children get faster at recognising familiar words in speech between 19 and 31 months of age — related
- Faster processing speed predicts greater vocabulary growth only for children with smaller vocabularies at 19 months — related
- Processing speed at 19 months does not significantly influence linear vocabulary growth between 19 and 30 months — related
- Faster word recognition at 24 months is associated with larger vocabularies and greater vocabulary gains in Spanish-learning children — related
- Faster processing speed at 19 months predicts faster syntactic growth between 19 and 30 months, controlling for concurrent vocabulary — related
- Children's vocabulary and reaction time improved significantly from 18 to 24 months, and maternal talk measures were highly intercorrelated — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
processing-speed-individual-differences-stable-19-31-months |
title |
Individual differences in processing speed remain broadly stable between 19 and 31 months |
description |
Individual differences in processing speed remain broadly stable between 19 and 31 months |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2019 |
recheck_by |
2024 |
generated |
by process:wiki-ingest on 2026-10-17 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — michelle-s-peter-2019 |
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