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1-162 - New models of variation in everyday infancy: Insights from dense audiovisual corpora in six cultures

Thu, March 21, 2:15 to 3:45pm, Hilton Baltimore, Floor: Level 1, Latrobe

Session Type: Paper Symposium

Integrative Statement

Dense recordings of the contexts in which infants learn and grow over their first year provide critical insights about patterns of environmental variation that may drive developmental change. The papers in this symposium offer an unprecedented window into everyday infancy, with over 3500 hours of infant-available sights and sounds captured across six cultures. The first two papers quantify developmental trajectories of two foundational contexts for language learning. Paper 1 finds cross-cultural variation in how often infants hold objects in Tseltal Mayan and Papuan communities, and discusses the implications for word learning. Paper 2 reports developmentally changing rates of adult-adult interactions near infants in North American English, UK English, Argentinian Spanish, and Tseltal Mayan using hand-segmented annotations, replicating prior findings with automated annotations. The next two papers quantify how infant-available speech varies across multiple days per week and per month for the same infants. Paper 3 details rhythms of speech onsets among North American English caregivers at the minute, hour, and day-long timescales and points to new directions in modeling non-uniformities in infant experience. Paper 4 finds that booksharing and multi-party interactions drive variation in turn-taking and amount of speech available to infants in Spanish-English bilingual families in the US. Collectively, these papers share insights about periods of development, cultures, and analytic targets that are severely under-represented in traditional inquiries into how environments shape development. We will also share corpora, manuals, and code (as allowable) to spur future collaborative discoveries.

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