Task planning and its effect on the complexity of second language (L2) written production have been studied extensively. However, the results of these studies are inconclusive, and at times contradictory, potentially as a result of variation in metrics of linguistic complexity. This study is an extension of earlier research syntheses and quantitative meta-analyses on the effects of planning on oral and written L2 production. It examines the identification and selection of linguistic complexity metrics in previous research on planning and its subsequent effects on the linguistic complexity of written L2 production. This research-focused synthesis of studies surveys construct definitions and operational definitions of linguistic complexity in the research domain and provides an overview of rationales for metric selection in the included studies. Methodological implications for future research are discussed in light of the findings.

中文翻译：

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第二语言写作中的语言复杂性：来自任务规划研究的见解


任务规划及其对第二语言 （L2） 书面生产复杂性的影响已被广泛研究。然而，这些研究的结果是不确定的，有时是矛盾的，这可能是由于语言复杂性指标的变化。本研究是早期研究综合和定量荟萃分析的延伸，旨在研究计划对 L2 口语和书面语产生的影响。它研究了以前关于规划的研究中语言复杂性指标的识别和选择，以及它对书面 L2 生产语言复杂性的后续影响。这种以研究为重点的研究调查综合构建了研究领域语言复杂性的定义和操作定义，并概述了纳入研究中度量选择的基本原理。根据研究结果讨论了对未来研究的方法学意义。