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Simultaneous bilingual children sometimes display crosslinguistic influence (CLI), widely attested in the domain of morphosyntax. It remains less clear whether CLI affects bilinguals’ event construal, what motivates its occurrence and directionality, and how developmentally persistent it is. The present study tested predictions generated by the structural overlap hypothesis and the co-activation account in the motion event domain. 96 English–French bilingual children of two age groups and 96 age-matched monolingual English and French controls were asked to describe animated videos displaying voluntary motion events. Semantic encoding in main verbs showed bidirectional CLI. Unidirectional CLI affected French path encoding in the verbal periphery and was predicted by the presence of boundary-crossing, despite the absence of structural overlap. Furthermore, CLI increased developmentally in the French data. It is argued that these findings reflect highly dynamic co-activation patterns sensitive to the requirements of the task and to language-specific challenges in the online production process.

The present chapter shares the interest of preceding contributions in the consequences of cross-linguistic diversity for language acquisition. We explore the implications of Talmy’s motion event typology (see also Luk and Vidaković, this volume) for bilingual first and adult second language acquisition. In line with previous contributions, we address the role of typological and general cognitive factors, with a particular focus on cross-linguistic interactions (see also Chan et al. and Saddour, this volume). A bidirectional production experiment indicated that bilingual children’s motion descriptions display parallels both with monolinguals and second language learners. Unidirectional cross-linguistic interactions suggest that typological properties affect online production strategies in both acquisition situations. Finally, we discuss implications for the dynamics of event processing in bilingualism.

This paper examines whether cross-linguistic differences in motion encoding affect event processing, specifically memory performance. We compared speakers of two languages which differ strikingly in how they habitually encode MANNER and PATH of motion (Talmy in Toward a cognitive semantics: typology and process in concept structuring, 2nd edn, vol 2. MIT Press, Cambridge, 2000). We tested French and English adult native speakers across three tasks that recruited and/or suppressed verbal processing to different extents: verbal event descriptions elicited on the basis of dynamic motion stimuli, a verbal memory task testing the impact of prior verbalisation on target recognition, and a non-verbal memory task, using a dual-task paradigm to suppress internal verbalisation. Results showed significant group differences in the verbal description task, which mirrored expected typological tendencies. English speakers more frequently expressed both MANNER and PATH information than French speakers, who produced more descriptions encoding either PATH or MANNER alone. However, these differences in linguistic encoding did not significantly affect speakers' memory performance in the memory recognition tasks, neither in the verbal nor in the non-verbal condition. The findings contribute to current debates regarding the conditions under which language effects occur and the relative weight of language-specific and universal constraints on spatial cognition.

The present study compares (1) monolingual English vs. French adults and children and (2) simultaneous French-English bilingual children who describe caused motion events. The results concerning L1 speakers showed developmental progressions in both languages, e.g., utterance complexity increases with age. However, response patterns differed considerably across languages in that responses were denser and more compact in English than in French. The results concerning bilingual children showed unidirectional crosslinguistic interactions. Responses elicited in English paralleled monolingual developmental patterns, whereas bilinguals' French productions differed from those of monolingual French peers. The findings suggest that bilingual children transfer lexicalisation patterns from one of their languages to the other when the former provides more transparent means of achieving high semantic density.