The main objective of this paper is to test experimentally the role of convergence in language acquisition (second language acquisition specifically), with implications for creole genesis. Although there is ample evidence that similar features in languages in contact are enhanced both in second language acquisition and the creation of new languages, scholars are rarely explicit about the exact nature of that similarity and have not been in a position to observe convergence in progress. Our experiment is unique on two fronts as it is the first to use an artificial language to test the convergence hypothesis by making it observable, and it is also the first experimental study to clarify the notion of similarity by varying the levels and types of similarity that are expressed. We report an experiment with 94 English-speaking adults, designed to test how language learners acquire a new language in which the form and function (meaning) of linguistic items are either similar to or distinct from those in their L1. A miniature artificial language was created that included morphological elements to express negation and pluralization. Participants were randomly assigned to one of three conditions: congruent (form and function of novel grammatical morphemes were highly similar to those in English), reversed (negative grammatical morpheme was highly similar to that of English plural, and plural grammatical morpheme was highly similar to that of English negation), and novel (form and function were highly dissimilar to those of English). For each task, scores were entered into a one-way ANOVA with condition as the between-subjects factor. Participants in the congruent condition performed best, indicating that features that converge across form and function are learned most fully. More surprisingly, results showed that participants in the reversed condition acquired the language more readily than those in the novel condition, contrary to expectation. This experiment contributes to a

Over the course of language acquisition, the brain becomes specialized in the perception of native language speech sounds or phonemes. As a result, adult speakers are highly efficient at processing their native language, but may struggle to perceive some non-native phonemes. This specialization is thought to arise from changes that occur in a person's brain as a result of maturation and language experience. In this study, adult native speakers of English were asked to discriminate between phonemes of varying degrees of difference from English (similar to English: Tagalog /na/-/ŋa/; different from English: Ndebele /k||i/-/k!i/), as their brain activity was measured using functional near infrared spectroscopy imaging. The left inferior frontal region showed activation only during the native condition; this finding is discussed in the context of developmental and adult neuroimaging work and suggests that the left inferior frontal region is critical for perceiving native phoneme contrasts during development and in adulthood.

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This study compares bi-dialectal and mono-dialectal five-and six-year-old children’s sociolinguistic awareness and ability to discriminate regional accents in their native language. Children who regularly hear multiple regional varieties in their input are expected to have better awareness and discrimination accuracy. The children participated in two tasks: an awareness task, assessing their knowledge of regional variation, and a similarity judgment task, assessing their ability to discriminate between speakers based on accents. Results show that both groups reliably discriminate between regional accents, and can identify a local regional accent. However, no advantage is found for either group of participants on either task. The effects of exposure to regional phonological variation on perception and awareness are discussed in light of these findings.