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This study explores the interplay between task repetition and task motivation in second language (L2) writing, specifically focusing on syntactic complexity, accuracy, and lexical complexity (CAL). Aligning with Dörnyei’s call to balance cognitive and affective factors in task-based language teaching (TBLT), the research involved 100 advanced mid-level learners of English as a second language (ESL) aged between 18 and 20 years. Participants completed both simple and complex argumentative writing tasks in a counterbalanced order, with a one-week interval between tasks. A perception questionnaire was administered immediately after each task performance to validate cognitive task complexity manipulations. Subsequently, participants repeated the same tasks with the same time interval, complemented by the completion of a task motivation questionnaire after each task. Written essays were collected and analysed for CAL measures. Employing a multivariate multilevel approach, the results were triangulated with self-report data. Findings indicate that task repetition significantly impacted CAL in L2 writing, with a positive moderation effect by task complexity. Additionally, task motivation enhanced syntactic complexity in both simple and complex tasks, with negligible effects on accuracy. Notably, task motivation exerted a more substantial influence on students’ repeated task performance concerning lexical complexity. The study’s results offer theoretical and pedagogical insights for TBLT researchers and L2 writing practitioners.
Tabari et al. (Tue,) studied this question.