Prototype effects in first and second language learners: The case of English transitive semantics

According to usage-based approaches to language acquisition, linguistic constructions should display prototype effects, or graded category membership (e.g., Bybee, 2010). Using the prototype-plus-distortion methodology (Franks & Bransford, 1971), Ibbotson, Theakston, Lieven, and Tomasello (2012) have provided evidence for prototype effects in adult native English speakers, who had false-positive recognition of sentences with prototypical transitive semantics as having been previously encountered after being exposed to non-prototypical transitive semantics. In the current study, I adopted this methodology and investigated whether the effects can be replicated and additionally observed from English-as-a-second-language (ESL) learners. Results from two groups of adult native English speakers (N=20 and N=21), each exposed to a different stimuli set, suggested some, but not strong, effects and revealed the complexity of the use of this methodology with linguistic materials. Moreover, no effects were observed from advanced adult ESL learners (N=22), suggesting possible differences between first and second transitive semantic representations.