Parameter setting in multilingual children with special reference to acceleration in French

Abstract

Linguistic theorizing has revised the switch metaphor of parameters as being part of Universal Grammar. Within an epigenetic approach to language (Biberauer et al., 2014; Roberts, 2019), parameters result from the interaction of innate (linguistic) knowledge and universal non-language-specific cognitive optimization strategies, which are set in relation to the child’s experience. Languages vary at different levels of granularity (Baker, 2014), which is expressed in a parameter taxonomy, more particularly in parameter hierarchies (Roberts, 2019) distinguishing macro-, meso-, micro-, and nanoparameters (Biberauer et al., 2014). In the context of multilingualism, Mac Swan (2000) has argued that some components of the architecture of the language faculty are duplicated in multilingual children, while others are not. Parameter hierarchies, defined as previously, belong to the non-duplicated components. Therefore, multilingual children set the parameters simultaneously for all their different languages at the relevant level of variation. Taken together, these assumptions can account for acceleration effects exceeding monolingual limits in multilingual French as a non-null-subject language, if (one of) the other language(s) is a null-subject language like Italian or Spanish for example. The results reported come from longitudinal studies of balanced as well as unbalanced multilingual children during early stages of language development (from 1;6 until the age of 5) and cross-sectional studies of multilingual children at similar ages.