Child-directed speech predicts real-time language-processing efficiency at 19 and 24 months and explains gains in efficiency¶

Claim · All claims
Evidence · 1 study · associational r2 · q3 · i3 large
Currency · newest study 2013 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i3 Amount of child-directed speech was correlated with processing efficiency at 19 months (r = 0.44) and 24 months (r = 0.51), and predicted gains in efficiency from 19 to 24 months (r = 0.47 controlling for 19-month processing). → Weisleder Adriana 2013

Evidence¶

Weisleder Adriana 2013¶

Weisleder Adriana, Fernald Anne. (2013). Talking to children matters: Early language experience strengthens processing and builds vocabulary. Psychological Science. https://doi.org/10.1177/0956797613488145

q3 · i3 · associational · r2

Correlational analysis linking LENA-measured child-directed speech to performance in the looking-while-listening task, where efficiency was the proportion of time fixating the target picture 300-1800 ms after word onset. Controlling for 19-month processing, "children who heard more child-directed speech were more efficient in language processing at 24 months" (r = 0.47, p < 0.05).

"Amount of exposure to child-directed speech was reliably correlated with children's processing efficiency at 19 (r = 0.44, p < 0.05) and 24 months (r = 0.51, p < 0.01)"

Discussion¶

Related Claims¶

• Amount of child-directed speech at 19 months predicts expressive vocabulary size at 24 months in low-SES Spanish-learning infants — related
• Processing efficiency at 19 months mediates the relation between child-directed speech and 24-month vocabulary — related
• The mediation of child-directed speech effects through processing efficiency holds after controlling for knowledge of the target words and excluding at-chance performers — related
• Maternal talk quantity at 18 months predicts Spanish-learning children's vocabulary size and vocabulary gains at 24 months, controlling for earlier vocabulary — related
• Within low-SES samples, quality of mother–child communication predicts children's later expressive language more strongly than input quantity — related
• Parental language input differs in quantity and quality across SES groups and relates to children's vocabulary, grammar, and processing development — related
• Overheard adult speech is unrelated to 24-month vocabulary, unlike child-directed speech — related
• Infants' preference for and learning benefit from child-directed speech change over development, with CDS advantages diminishing by the third year — related