People use different communication patterns based on the context and who they are addressing. These differences, known as linguistic register, are common across human speech and recognized early in development. Here, we examine 4-11-year-old American children's (N = 227) ability to use linguistic registers to determine a speaker's addressee as…

Language development can be framed as the process of learning how to mean (Halliday, 1975). From this perspective, the role of communicative function is central to the language-learning process with development being guided by interaction with experienced others. In the current study, we present a detailed analysis of the communicative functions…

A surprising comprehension-production asymmetry in subject-verb (SV) agreement acquisition has been suggested in the literature, and recent research indicates that task-specific as well as language-specific features may contribute to this apparent asymmetry across languages. The present study investigates when during development children acquiring…

Research on sources of individual difference in parental Infant-Directed Speech (IDS) is limited and there is a particular lack of research on fathers' compared to mothers' speech. This study examined the predictive relations between infant characteristics and variability in paternal lexical diversity (LD) in dyadic free play with two-year-olds (M…

To understand spoken words, listeners must appropriately interpret co-occurring talker characteristics and speech sound content. This ability was tested in 6- to 14-months-olds by measuring their looking to named food and body part images. In the "new talker" condition (n = 90), pictures were named by an unfamiliar voice; in the…

Efficient language use involves the capacity to flexibly adjust to varied pronunciations of words. Although children can contend with some accent variability before their second birthday, it is currently unclear when and how this ability reaches its mature state. In a series of five experiments, we examine the developmental trajectory of toddlers'…

As infant/toddler programs encounter growing diversity, they need to reenvision the impact they have on children and families in all areas of practice, from recruiting new enrollees to stocking classrooms to changing the ways adults interact with children and families with different languages and from different cultures. What happens on the first…

Much recent research has described the development of innovative functions of "like" as a discourse marker ("'Like' they're trying to be discreet about it") or discourse particle ("Maybe it's 'like' a girl thing") and as a quotative marker ("He's 'like' 'I don't want to work until later'"). Comparatively little is known about how speakers acquire…