This study examined the relationship between complexity, accuracy and fluency (CAF), using longitudinal data. Conducted from the perspective of complex dynamic systems theory (CDST), this research adopted four CAF general measures to track the development of five Chinese undergraduates' English speech over a 15-week period. LOWESS graphs supported…

The primary objective of this study was to compare the syntactic complexity of informational texts produced by fifth-grade students (a) with and without language impairment and (b) with and without native English-speaking proficiency on a curriculum-based reading and writing task. Expository writing samples produced by 114 children enrolled in the…

The present study investigated the potential of writing in English as a foreign language (EFL) for language learning by manipulating cognitive task complexity based on related models and hypotheses. English essays written by 59 Chinese postgraduate EFL students from different subject areas were analysed with reference to writing complexity,…

This study explores syntactic and lexical complexity in argumentative essays written by Artificial Intelligence (AI) and Humans (HS). First year Tswana second language (L2) learners of English in a South African University wrote the HS argumentative essays. The AI essays have been generated by ChatGPT-3.5 on the same topics. Using a…

This study investigates the effects of teacher-focused feedback (TF) and automatic writing evaluation (AWE) on global writing performance as well as syntactic complexity, accuracy, lexical diversity, and fluency (CALF) of English as a foreign language (EFL) learners' narrative and argumentative writings. The participants were randomly assigned to…

Writing is closely related to contextual experiences about the topics. However, in traditional EFL writing classes, learners' lack of in-depth experience in learning contexts may be the leading cause rendering students' poor writing performance. To address this problem, a quasi-experimental study was conducted to investigate the impacts of a…

For Chinese students, studying in a country with different cultural components and language structures is challenging. Compared to English, the Chinese prefers shorter and simple sentence structure and allows for two sentences to be stated side by side. Different sentence structures in Chinese may influence native-Chinese readers' understanding of…

The effectiveness of English Language Teaching (ELT) materials significantly influences the learning outcomes of English as a Foreign Language (EFL) learners, positioning these resources as cardinal in the acquisition process. Despite this widely acknowledged significance, there remains a notable gap in research concerning the evaluation of key…

This study explored the relationship between task complexity, textual emotionality, and linguistic complexity in second language (L2) writing. Fifty-eight L2 English learners performed simple and complex versions of an argumentative writing task manipulated along with resource-­directing variables. The essays were first analysed for textual…

This study investigates how task complexity affects native speakers' and second language (L2) learners', and experts' perceptions of task difficulty in writing tasks. It also explores how task complexity influences English native speakers' and L2 learners' linguistic complexity in their writing. Ninety participants performed one simple and one…

Language proficiency policies act as critical gatekeepers for multilingual international students (MIS) who intend to pursue an education at English-medium universities. The current study revisits the question of the predictive validity of a standardized English proficiency exam--International English Language Testing System (IELTS)--in comparison…

This study examined the relationship of linguistic complexity, captured using a set of lexical richness, syntactic complexity, and discoursal complexity indices, to second language (L2) learners' perception of text difficulty, captured using L2 raters' comparative judgment on text comprehensibility and reading speed. Testing materials were 180…

In successful writing development, English as a foreign language (EFL) learners not only need to acquire grammatical complexity (GC) features but also know when and how to use them flexibly across communicative contexts, known as register flexibility. The present study, guided by the sociocultural theory of language learning, examines descriptive…

An extensive body of research has investigated the role of syntactic complexity in gauging the linguistic complexity of reading texts, particularly for the purpose of determining their grade appropriateness. However, little such research has focused on adapted teaching materials for English as a foreign language (EFL) contexts, and to date there…

The pervasive use of information and computer technology in second or foreign language learning has led researchers to explore the ideal tasks for technological environments to facilitate second language (L2) learning. This study intended to contribute new knowledge to this area by examining the effects of the task complexity manipulated along the…