Parental language input influences child language outcomes but may vary based on certain characteristics. This research examined how parental language differs during two contexts for toddlers at varying likelihood of autism based on their developmental skills. Parental language (quantity, quality, and pragmatic functions) was analyzed during…

Emotion words allow us to identify, describe and regulate our emotional states. Emotion vocabulary grows through childhood, but little research has considered emotion words in the context of children's written language. To address this gap, we used a cross-corpus developmental approach to chart the emergence of emotion words in children's reading…

Shared intentionality theory posits that at age 3, children expand their conception of plural agency to include 3- or more-person groups. We sought to determine whether this conceptual shift is detectable in children's pronoun use. We report the results of a series of Bayesian hierarchical generative models fitted to 479 English-speaking…

The current study examined how mothers' production of four types of internal state words at multiple ages across the second year in a free play context was related to their infants' acquisition of those words. Twenty-nine mother-infant dyads were videotaped for 18 minutes during free play when infants were 13 and 17 months old. Mothers' total and…

The paper investigates a Hungarian-English bilingual child's Sarah's second language acquisition (SLA) with a special focus on how she integrated English (L2) into her speech to convey the intended meaning and negotiate the multiple identities she developed in her bilingualism in various social contexts. An ethnographic single-case study research…

The Mandarin resultative verb compound (RVC; e.g., "tui dao" "push fall" and "pa shang" "climb ascend") encodes complex events composed of an initiating action and resulting activity or state. This study investigated when Mandarin-speaking children acquired this language-specific device. Specifically, we…

Mixed-ethnic children in Japan do not usually acquire the language of their non-Japanese parent. This study looks at their lost opportunity to acquire their minority parent's language through a retrospective investigation of their language experiences from childhood to young adulthood. Transcripts of interviews with ten mixed-ethnic children (ages…

According to the critical period hypothesis, the earlier the acquisition of a second language starts, the better. Owing to the plasticity of the brain, up until a certain age a second language can be acquired successfully according to this view. Early second language learners are commonly said to have an advantage over later ones especially in…

A study was undertaken to explore the relationship of mothers' language to infant development in terms of the infants' development of sensorimotor intelligence. Specifically, the study chronicled the infants' advances in sensorimotor development from J. Piaget's Stage II to Stage III as a possible explanation for changes in maternal language. It…

A study compared mothers' and fathers' speech patterns when speaking to preschool children, particularly utterance length, sentence types, and word frequencies. All of the children attended a nursery school with a student population of 136 in a large urban area in the Southwest. Volunteer subjects, 28 mothers and 28 fathers of 28 children who…

Examined whether there is an earlier developmental stage than 2 years of age when bilingual children do not use their languages in pragmatically differentiated ways. Analyses of recordings of four French-English bilingual children in Canada during free play sessions with their mothers and fathers suggest a stage very early in development when…