When speaking to infants, adults often produce speech that differs systematically from that
directed to other adults. To quantify the acoustic properties of this speech style across a wide …

Daylong at‐home audio recordings from 10 Tseltal Mayan children (0; 2–3; 0; Southern
Mexico) were analyzed for how often children engaged in verbal interaction with others and …

Language use in everyday life can be studied using lightweight, wearable recorders that
collect long-form recordings—that is, audio (including speech) over whole days. The …

The rate at which young children are directly spoken to varies due to many factors, including
(a) caregiver ideas about children as conversational partners and (b) the organization of …

Both music and language are found in all known human societies, yet no studies have
compared similarities and differences between song, speech, and instrumental music on a …

The pace of infant learning is inspiring. Babies learn new skills while interacting with the
people, objects, and spaces in their everyday environments. Grounded in a developmental …

For the past 25 years, researchers have investigated language input to children from high‐
and low‐socioeconomic status (SES) families. Hart and Risley first reported a “30 Million …

Theories of language development—informed largely by studies of Western, middleclass
infants—have highlighted the language that caregivers direct to children as a key driver of …

During everyday interactions, mothers and infants achieve behavioral synchrony at multiple
levels. The ebb-and-flow of mother-infant physical proximity may be a central type of …

What are the vocal experiences of children growing up on Malakula island, Vanuatu, where
multilingualism is the norm? Long‐form audio‐recordings captured spontaneous speech …