02450caa a2200193   4500008004100000022001400041100002000055245016800075260002900243300001300272490002300285520163800308653015301946700002002099773005502119856005002174942001502224999001702239210629s9999    xx            000 0 und d  a1754-9515  aMahesh, B. V. M 0a The effects of English (L2) language proficiency on speech motor indices for bisyllabic bilabial word utterances in typical Kannada (L1)–English (L2) bilinguals  bInforma UK Limitedc2016  a171-179   vVolume 19  Issue 3  aObjectives: The study examined the influence of second language proficiency on intra-articulatory and inter-articulatory speech motor variability measures for bilabial bisyllabic words in typical Kannada (L1)-English (L2) bilinguals. Methods: Sixteen typical Kannada English bilingual adults were categorized into high and low L2 proficiency groups (n=8 each) participated in a task of repeating a bilabial bisyllabic word pair matched for syllable structure, syllable length and duration. To understand the intra-articulatory and inter-articulatory stability, Spatiotemporal Index (STI) of Lower Lip (LL) and Lip Aperture Variability (LAVAR) measures were computed respectively. A mixed language paradigm was used where the word pairs of L1 and L2 were randomly mixed and presented to the participants.Results: Analysis of STI of LL revealed comparable movement stability across languages and the influence of L2 language proficiency was found to be insignificant. However, LAVAR revealed language specific differences wherein L1 was more variable than L2. Further, LAVAR was found to be independent of L2 language proficiency, possibly suggesting a language invariant speech motor plan operating at the intra-articulatory level but a language sensitive speech motor plan functioning at the inter-articulatory stability measure in a word context.Conclusion: The findings did not support the influence of L2 language proficiency on STI and LAVAR measures in a word context. The study concluded with a possible scope of utilizing mixed language paradigm in speech motor control studies addressing speech motor stability in bilinguals.  aLanguage proficiency, Spatiotemporal Index (STI), Lip Aperture Variability (LAVAR), Kannada, Bilinguals, Speech motor control, Bisyllabic, Bilabials  aRajanna Manjula  aInternational Journal of Speech-Language Pathology  uhttps://doi.org/10.1080/2050571X.2016.1164977  cFJASyFJAS  c17924d17924