Abrahamsson, N., & Hyltenstam, K. (2009). Age of onset and nativelikeness in a second language: Listener perception versus linguistic scrutiny. Language Learning, 59, 249–306.
Crossley, S. A., Salsbury, T., & McNamara, D. S. (2015). Assessing lexical proficiency using analytic ratings: A case for collocation accuracy. Applied Linguistics, 36, 570–590.
Crowther, D., Trofimovich, P., & Isaacs, T. (2016). Linguistic dimensions of second language accent and comprehensibility: Nonnative listeners’ perspectives. Journal of Second Language Pronunciation, 2, 160–182.
Crowther, D., Trofimovich, P., Isaacs, T., & Saito, K. (2015a). Does a speaking task affect second language comprehensibility?
The Modern Language Journal, 99, 80–95.
Crowther, D., Trofimovich, P., Saito, K., & Isaacs, T. (2015b). Second language comprehensibility revisited: Investing the effects of learner background. TESOL Quarterly, 49, 814–837.
Derwing, T. M., & Munro, M. J. (2015). Pronunciation fundamentals: Evidence-based perspectives for L2 teaching and research. Amsterdam, The Netherlands: John Benjamins.
Derwing, T. M., Munro, M. J., Thomson, R. I., & Rossiter, M. (2009). The relationship between L1 fluency and L2 fluency development. Studies in Second Language Acquisition, 31, 553–557.
Derwing, T. M., Rossiter, M. J., Munro, M. J., & Thomson, R. I. (2004). Second language fluency: Judgments on different tasks. Language Learning, 54, 655–679.
Educational Testing Service. (2006). The official guide to the new TOEFL iBT. Princeton, NJ: McGraw Hill.
Foster, P., & Skehan, P. (1996). The influence of planning and task type on second language performance. Studies in Second Language Acquisition, 18, 299–323.
Harding, L. (2017). What do raters need in a pronunciation scale? The users’ view. In Isaacs, T. & Trofimovich, P. (Eds.), Second language pronunciation assessment. Bristol, UK: Multilingual Matters.
Hilton, H. (2008). The link between vocabulary knowledge and spoken L2 fluency. The Language Learning Journal, 36, 153–166.
IELTS. (2009). Official IELTS practice materials. Los Angeles: IELTS International.
Isaacs, T., & Trofimovich, P. (2012). Deconstructing comprehensibility: Identifying the linguistic influences on listeners’ L2 comprehensibility ratings. Studies in Second Language Acquisition, 34, 475–505.
Larson-Hall, J. (2009). A guide to doing statistics in second language research using SPSS. New York, NY: Routledge.
Levis, J. M. (2005). Changing contexts and shifting paradigms in pronunciation teaching. TESOL Quarterly, 39, 369–377.
O’Brien, M. G. (2016). Methodological choices in rating speech samples. Studies in Second Language Acquisition, 38, 587–605.
Oppenheimer, D. M. (2008). The secret life of fluency. Trends in Cognitive Sciences, 12, 237–241.
Plonsky, L., & Oswald, F. L. (2014). How big is “Big”? Interpreting effect size in L2 research. Language Learning, 64, 878–912.
Rau, D. V., Chang, H.-H. A., & Tarone, E. (2009). Think or sink: Chinese learners’ acquisition of the English voiceless interdental fricative. Language Learning, 59, 581–621.
Révész, A., Michel, M., & Gilabert, R. (2015). Measuring cognitive task demands using dual-task methodology, subjective self-ratings, and expert judgments: A validation study. Studies in Second Language Acquisition, 38(4), 703–737.
Robinson, P. (2005). Cognitive complexity and task sequencing: Studies in a componential framework for second language task design. International Review of Applied Linguistics in Language Teaching, 43, 1–32.
Saito, K., Trofimovich, P., & Isaacs, T. (2015). Using listener judgments to investigate linguistic influences on L2 comprehensibility and accentedness: A validation and generalization study. Applied Linguistics amv047. doi: 10.1093/applin/amv047
Saito, K., Webb, S., Trofimovich, P., & Isaacs, T. (2016). Lexical profiles of comprehensible second language speech. Studies in Second Language Acquisition, 38(4), 677–701.
Skehan, P. (2009). Modelling second language performance: Integrating complexity, accuracy, fluency and lexis. Applied Linguistics, 30, 510–532.
Tarone, E. (1983). On the variability of interlanguage systems. Applied Linguistics, 4, 142–164.
Trofimovich, P., & Isaacs, T. (2012). Disentangling accent from comprehensibility. Bilingualism: Language and Cognition, 15, 905–916.
Varonis, E. M., & Gass, S. (1982). The comprehensibility of nonnative speech. Studies in Second Language Acquisition, 4, 114–136.
Yuan, F., & Ellis, R. (2003). The effects of pre-task planning and on-line planning on fluency, complexity and accuracy in L2 monologic oral production. Applied Linguistics, 24, 1–27.