Parent vocabulary diversity at 30 months predicts child PPVT at 42 months with quantity, SES, and prior vocabulary controlled¶
Claim · All claims
Evidence · 1 study · associationalr2·q2
Currency · newest study 2012 · 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.
q2 i? Parent word types at 30 months significantly predict PPVT scores at 42 months after controlling for parent education, prior PPVT, and word tokens. → Rowe Meredith L 2012
Evidence¶
Rowe Meredith L 2012¶
Rowe Meredith L. (2012). A longitudinal investigation of the role of quantity and quality of child-directed speech in vocabulary development. Child development. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3440540/
q2 · i? · associational · r2
Multiple regression analysis (Model 5) predicting PPVT at 42 months in 50 dyads. "when parent word types was included, it was a significant positive predictor (p < 0.01)" with R-square increasing 9 percent over the quantity-only model.
"In Model 5, when parent word types was included, it was a significant positive predictor (p < 0.01) and the R-square from Model 4 increased by 9 percent."
Discussion¶
Child vocabulary was measured with the Peabody Picture Vocabulary Test—Third Edition (PPVT-III), chosen because it is independent of the parent-child interaction whose input it is being predicted from.
Related Claims¶
- Parent explanations at 42 months are marginally related to child PPVT at 54 months with controls — related
- Parent education relates to input quantity and quality but not to narrative utterances — related
- Parent rare word use at 30 months predicts child PPVT at 42 months with quantity, SES, and prior vocabulary controlled — possibly the same claim (merge candidate)
- Parental language input differs in quantity and quality across SES groups and relates to children's vocabulary, grammar, and processing development — a broader claim this one bears on
- Proportions of rare words and decontextualized utterances in parent input increase linearly from 18 to 42 months — related
- Parent number talk is not related to children's general vocabulary development once SES and overall talk are controlled, indicating domain specificity — related
- Input quantity at 18 months predicts child vocabulary at 30 months over and above SES and prior vocabulary skill — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
vocabulary-diversity-30-months-predicts-vocabulary-42-months |
title |
Parent vocabulary diversity at 30 months predicts child PPVT at 42 months with quantity, SES, and prior vocabulary controlled |
description |
Parent vocabulary diversity at 30 months predicts child PPVT at 42 months with quantity, SES, and prior vocabulary controlled |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2012 |
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 — rowe-meredith-l-2012 |
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