Learning speaker- and addressee-centered demonstratives in Ticuna

Area of Science:

• Linguistics
• Developmental Psychology
• Cognitive Science

Background:

• Demonstratives (e.g., this, that, here, there) are crucial for spatial and referential communication.
• Ticuna, an Indigenous Amazonian language, possesses a complex demonstrative system that presents a unique case for studying language acquisition.
• Understanding demonstrative acquisition sheds light on cognitive development and language-learning biases.

Purpose of the Study:

• To investigate the developmental trajectory of demonstrative acquisition in young children learning Ticuna.
• To analyze the relationship between children's age, their production of demonstratives, and caregiver production patterns.
• To determine if cognitive biases influence the order and frequency of demonstrative use in children.

Main Methods:

• Analysis of 89 video-recorded child-caregiver interaction samples.
• Focus on 45 children aged 1;0 to 4;11 learning Ticuna.
• Categorization and frequency analysis of demonstrative types (speaker-proximal, speaker-distal, addressee-proximal, nominal, locative).

Main Results:

• Children acquired speaker-proximal and speaker-distal demonstratives earlier than addressee-proximal ones.
• Nominal demonstratives were acquired before locative demonstratives.
• Children overused speaker-proximal demonstratives but achieved adult-like use of other types by age 2;0.

Conclusions:

• Cognitive biases toward egocentricity and proximity significantly shape demonstrative acquisition in children.
• Semantic simplicity also appears to be a factor in the early learning of demonstratives.
• The findings support theories linking cognitive development to specific patterns in early language acquisition.