Use of a Head Camera to Examine Maternal Input and Its Relation to 10- to 26-Month-Olds' Acquisition of Mental and Non-Mental State Vocabulary

• Published in: Journal of child language Vol. 47; no. 6; pp. 1228 - 1243
• Main Authors: Ruffman, Ted, Lorimer, Ben, Vanier, Sarah, Scarf, Damian, Du, Kangning, Taumoepeau, Mele
• Format: Journal Article
• Language: English
• Published: England Cambridge University Press 01-11-2020
• Subjects: Age Differences; Correlation; Female; Humans; Infant; Infants; Interpersonal Communication; Language Acquisition; Language Development; Male; Measurement Equipment; Mother-Child Relations; Mothers; Parent Child Relationship; Responses; Toddlers; Vocabulary; Vocabulary Development; maternal responsiveness; non-mental state vocabulary; mental state vocabulary
• ISSN: 0305-0009; 1469-7602
• DOI: 10.1017/S0305000920000240

We examined the relation between maternal responsiveness and children's acquisition of mental and non-mental state vocabulary in 59 pairs of mothers and children aged 10 to 26 months as they engaged in a free-play episode. Children wore a head camera and responsiveness was defined as maternal talk that commented on the child's actions (e.g., when the child reached for or manipulated an object visible in the head camera). As hypothesized, maternal responsiveness correlated with both mental and non-mental state vocabulary acquisition in younger children (approximately 18 months and younger) but not older children. We posit a diminishing role for maternal responsiveness in language acquisition as children grow older.