Effects of cognitive task complexity and online planning on second language learners' argumentative writing

Area of Science:

• Second Language Acquisition
• Cognitive Linguistics
• Writing Studies

Background:

• Theoretical frameworks like Skehan's Limited Attentional Capacity Model (LACM) and Robinson's Cognition Hypothesis suggest cognitive load affects L2 writing.
• Understanding how task complexity influences writing performance is crucial for pedagogical applications.

Purpose of the Study:

• To investigate the impact of cognitive task complexity on syntactic complexity, lexical complexity, accuracy, fluency, and functional adequacy in Chinese L2 argumentative writing.
• To examine the interplay between task complexity and writing performance under an online planning condition.

Main Methods:

• Sixty-eight Chinese university students completed two argumentative writing tasks with varied complexity (presence of argument elements).
• Analysis focused on syntactic complexity (e.g., subordination, elaboration), lexical complexity, accuracy, fluency, and functional adequacy (content, organization).

Main Results:

• Increased task complexity led to decreased subordination and increased phrasal elaboration.
• No significant changes were observed in accuracy or fluency.
• Functional adequacy (content, organization, overall scores) significantly decreased with higher task complexity.

Conclusions:

• Cognitive task complexity negatively affects syntactic complexity and functional adequacy in Chinese L2 writing, supporting limited attentional and executive capacity models.
• The findings highlight trade-offs between syntactic complexity and functional adequacy, indicating cognitive resource allocation challenges for L2 learners.
• Implications suggest careful consideration of task design in L2 writing instruction to balance complexity and performance.