More like guidelines than hard rules: Bilinguals accept lexical overlap despite using mutual exclusivity

Area of Science:

• Developmental Psychology
• Linguistics
• Cognitive Science

Background:

• Mutual exclusivity (ME) is a key word-learning strategy for young children, enabling referent selection for novel labels.
• Bilingual children's ability to accept second labels for familiar objects is known, but implicit acceptance of lexical overlap in ambiguous contexts remains unclear.

Purpose of the Study:

• To investigate how monolingual and bilingual children handle ambiguous naming situations involving familiar and novel objects and labels.
• To examine children's retention of novel word-object associations versus associations between novel labels and familiar objects.

Main Methods:

• A tablet-based referent selection task was used with 123 monolingual and 131 bilingual children aged 3-10 years.
• Children were tested on their ability to associate novel labels with objects under conditions of potential lexical overlap.

Main Results:

• Both monolingual and bilingual children utilized ME, but bilinguals relied on it less than monolinguals.
• Monolinguals retained novel word-object links, while bilinguals retained novel label-familiar object links, indicating different learning strategies.

Conclusions:

• Bilingual children demonstrate greater openness to lexical overlap in ambiguous referent selection tasks.
• Language experience significantly shapes children's word-learning strategies, with effects persisting into the second year of life.