Within low-SES samples, quality of mother–child communication predicts children's later expressive language more strongly than input quantity¶

Claim · All claims
Evidence · 1 study (2 entries) · review r3 · q2
Currency · newest study 2016 · checked against its sources 2026-10-20 (automated, 2 of 2 entries) · not reviewed by a person

Subclaims¶

q2 i? In 60 low-income families, measures of communication quality (joint engagement, routines, fluency) accounted for more variance in expressive language at 36 months than maternal words per minute. → Schwab Jessica F. 2016 q2 i? Within low-SES samples, diversity of maternal lexical input predicted vocabulary growth while amount of maternal talk did not. → Schwab Jessica F. 2016 (2)

Evidence¶

Schwab Jessica F. 2016¶

Schwab Jessica F., Lew-Williams Casey. (2016). Language learning, socioeconomic status, and child-directed speech. Wiley interdisciplinary reviews. Cognitive science. https://doi.org/10.1002/wcs.1393

q2 · i? · review · r3

The review reports Hirsh-Pasek and colleagues' longitudinal study of 60 low-income families, in which hierarchical regression showed quality measures at 24 months predicted expressive language at 36 months better than quantity. No effect sizes are printed.

"within this low-SES sample, measures of the quality of mother–child communication more strongly predicted children’s expressive language abilities one year later than did the total number of words spoken by mothers."

Schwab Jessica F. 2016 (2)¶

Schwab Jessica F., Lew-Williams Casey. (2016). Language learning, socioeconomic status, and child-directed speech. Wiley interdisciplinary reviews. Cognitive science. https://doi.org/10.1002/wcs.1393

q2 · i? · review · r3

The review reports a longitudinal study of low-SES families between 14 and 36 months in which mothers varied significantly in amount and diversity of speech, and "diversity of maternal lexical input predicted vocabulary growth" while amount did not. No effect sizes are printed.

"diversity of maternal lexical input predicted vocabulary growth, as did maternal literacy skills, but amount of maternal talk did not."

Discussion¶

Related Claims¶

• Maternal talk quantity at 18 months predicts Spanish-learning children's vocabulary size and vocabulary gains at 24 months, controlling for earlier vocabulary — related
• Substantial variability in maternal talk existed within this primarily low-SES sample, and maternal talk was uncorrelated with SES — related
• 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
• The number of conversational turns is more closely associated with children's language skills and language-related brain function than the raw number of words heard, regardless of family income or education. — possibly the same claim (merge candidate)
• Child-directed speech varies dramatically among low-SES families, up to an 18-fold difference, largely independent of maternal education and overall talkativeness — related
• Child-directed speech predicts real-time language-processing efficiency at 19 and 24 months and explains gains in efficiency — related
• Amount of child-directed speech at 19 months predicts expressive vocabulary size at 24 months in low-SES Spanish-learning infants — related