Overheard adult speech is unrelated to 24-month vocabulary, unlike child-directed speech¶

Claim · All claims
Evidence · 1 study · associational r1 · q3
Currency · newest study 2013 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i? Exposure to overheard speech directed to other adults and children was not related to vocabulary size at 24 months (r = .25, p = .2). → 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 · i? · associational · r1

Same correlational analysis of the 29-infant sample: coders classified 5-min recording segments as child-directed or overheard, and overheard adult word rates did not predict later vocabulary. No effect size beyond the printed r is reported; equivalence was not tested.

"In contrast, differences in exposure to overheard speech directed to other adults and children were not related to vocabulary size (r = .25, p = .2)"

Discussion¶

Related Claims¶

• Child-directed speech predicts real-time language-processing efficiency at 19 and 24 months and explains gains in efficiency — related
• Child-directed speech varies dramatically among low-SES families, up to an 18-fold difference, largely independent of maternal education and overall talkativeness — related
• 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
• Maternal talk quantity at 18 months predicts Spanish-learning children's vocabulary size and vocabulary gains at 24 months, controlling for earlier vocabulary — related
• Infants' preference for and learning benefit from child-directed speech change over development, with CDS advantages diminishing by the third year — 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
• Faster word recognition at 24 months is associated with larger vocabularies and greater vocabulary gains in Spanish-learning children — related