Balancing syntactic complexity and clarity: the role of AI in enhancing academic writing proficiency

Purpose The purpose of this study is to investigate the transformative role of artificial intelligence (AI) tools in enhancing academic writing proficiency among English as a Foreign Language (EFL) learners. By focusing on the balance between syntactic complexity and clarity, the research evaluates the effectiveness of AI-enhanced educational tools such as Grammarly, ProWritingAid, Hemingway Editor, Quillbot, Writefull and Turnitin Revision Assistant. Utilizing a pretest-posttest randomized controlled trial, the study aims to measure improvements in clarity, precision, syntactic complexity, argumentation and adherence to academic standards, providing insights into AI’s potential in educational practices. Design/methodology/approach This study employs a pretest–posttest randomized controlled trial design to evaluate the impact of AI-enhanced educational tools on academic writing skills among 466 EFL postgraduate students. Participants are randomly assigned to six experimental groups, each using a different AI tool and a control group using traditional computer-assisted language learning methods. Writing proficiency is assessed using the IELTS writing test, syntactic complexity analysis, readability tests and a rubric for academic standards. Quantitative data are analyzed using ANOVA, while qualitative data from interviews and surveys provide insights into learners’ perceptions of AI tools’ effectiveness. Findings The study finds that AI-enhanced educational tools significantly improve academic writing proficiency among EFL postgraduate students compared to traditional methods. Notably, the Turnitin Revision Assistant demonstrates remarkable effectiveness across multiple dimensions, including clarity, precision, syntactic complexity and adherence to academic standards. Other tools like Grammarly and ProWritingAid also show substantial improvements in writing skills. Qualitative feedback reveals that learners perceive AI tools as beneficial, though challenges such as over-reliance and maintaining personal voice are noted. These findings underscore the potential of AI tools in educational practices, advocating for their strategic integration into curricula to foster 21st-century skills. Originality/value This study offers a novel contribution by empirically evaluating the specific impacts of various AI tools on distinct writing competencies among EFL learners, addressing existing gaps in the literature. By employing a rigorous methodological approach, it provides concrete evidence of AI’s effectiveness in enhancing academic writing skills, particularly in balancing syntactic complexity and clarity. The research also enriches the discourse on AI’s educational role through the lens of Nonlinear Dynamic Language Learning Theory, Constructivist Learning Theory and Cognitive Load Theory. These insights support the strategic implementation of AI tools in educational curricula, emphasizing their value in developing essential 21st-century skills.