Talking in Timor-Leste: Urbanization, Peer Input, and Other Influences on Children's Verbal Environments

Area of Science:

• Child Language Acquisition
• Socio-cultural Influences on Development
• Speech Input Analysis

Background:

• Early language development is shaped by diverse socio-economic and cultural contexts.
• Geographical expansion of language acquisition studies is vital for broader understanding.
• Timor-Leste presents a unique setting to investigate language input and learning.

Purpose of the Study:

• To quantify verbal input and production in young children in Timor-Leste.
• To explore factors influencing children's speech exposure and vocalizations.
• To assess the role of peer and adult input in language learning.

Main Methods:

• Large-scale study of 277 children (11-58 months) in Timor-Leste.
• Utilized child-worn audio recorders and open-source speaker diarization software.
• Analyzed daily verbal input and production across rural and urban settings.

Main Results:

• Children received 15 min/h of verbal input, primarily from peers and female adults.
• Rural children experienced more adult vocalizations and vocalized more than urban children.
• Child vocalizations were most strongly predicted by input from other children.

Conclusions:

• Peer vocalizations are particularly important for language development in Timorese homes.
• The positive association between maternal education and adult input is not universal.
• Long-form audio analysis is a valuable tool for cross-cultural language acquisition research.