An essential component for assessing the accuracy and fluency of language learners is understanding how mode of communication and task type affect performance in second-language (L2) acquisition. This study investigates how text-based synchronous computer-mediated communication (SCMC) and face-to-face (F2F) oral interaction can influence the performance of language learners in producing grammatical forms accurately when learners of English as a second language complete different tasks in their L2. Findings show a systematic variability in learner interlanguage that depends on mode of communication and task type. L2 learners used articles more correctly and produced advanced-stage questions more frequently in text-based SCMC than in F2F. These findings suggest that task types and the mode of communication in which a task is completed need careful selection based on pedagogical purposes in order to maximize L2 learning and better evaluate L2 performance.

中文翻译：

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模态和任务类型对中介语变异的影响

评估语言学习者的准确性和流利度的一个重要组成部分是了解沟通方式和任务类型如何影响第二语言 (L2) 习得的表现。本研究调查了当英语作为第二语言的学习者完成不同任务时，基于文本的同步计算机介导交流 (SCMC) 和面对面 (F2F) 口语互动如何影响语言学习者准确生成语法形式的表现。他们的L2。研究结果表明，学习者中介语的系统变异性取决于交流方式和任务类型。L2 学习者在基于文本的 SCMC 中比在 F2F 中更正确地使用文章并更频繁地提出高级问题。