This article presents a theoretical review of and methodological guidelines for the study of two key notions in second language acquisition research, complexity and difficulty. The term "complexity" has gained considerable currency over the past decades and has taken on a wide range of meanings. We argue for a more restricted…

This study examined second language (L2) learning difficulty of 13 Chinese grammatical constructions on the basis of teachers' perceptions and associated the L2 learning difficulty of Chinese grammatical constructions with teacher-perceived learner grammatical competence and with the instructional levels. A total of 77 experienced teachers were…

This study examines the impact of authentic versus modified text on L2 Turkish learners' reading comprehension. A total of 230 B1-level Turkish language learners were randomly divided into two groups: one reading a modified text (n = 115) and the other an authentic text (n = 115). Both groups completed a surface-level reading comprehension test.…

The International English Language Testing System (IELTS) has served as one of the most reliable proofs of people's English language proficiency. There have been rumors about the discrepancy in difficulty between the two modules of IELTS, namely Academic (AC) and General Training (GT); however, there is little empirical evidence to confirm such a…

The present study is a partial replication of the most widely cited study of lexical coverage and reading comprehension by Hu and Nation (2000). Ninety-four advanced L2 learners read a short story at one of 90%, 95%, 98%, and 100% lexical coverage and then completed a 14-item reading comprehension test. The results showed that although…

Some learners of Chinese as a foreign language (CFL) face difficulties learning Chinese characters (hanzi), particularly if they are from alphabetic language backgrounds such as English. Many CFL students need to develop the ability to self-regulate their learning to cope with the learning of hundreds of characters in the beginner and intermediate…

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…

This article examines the determinants of Syrian refugee students' language comprehension difficulties in Lebanon, Türkiye and Australia, three host countries offering refugees different types of legal status (short-term, medium-term and long-term legal settlement). To understand the influence of legal status and its corresponding educational…

This study investigates how task complexity shapes motivation and performance in second language (L2) pragmatics, a domain that remains underexplored within task-based learning research. To address this gap, 37 secondary school learners of English completed both simple and complex decision-making tasks at three intervals over an eight-week period.…

This study provides an overview of the level of students' cognitive load in learning English in vocational schools. A quantitative descriptive study uses a cross-sectional survey conducted to measure the level of cognitive load of students in learning English in vocational schools. The subjects are 69 respondents who are students from one of the…

A new kind of reading platform supported by ChatGPT has quickly become a popular research assistant among students due to its instant natural language interaction and question-answering capabilities. This study explored the effects of ChatGPT-based reading platform on student's foreign language paper reading. A total of 64 undergraduate students…

This study investigates the effects of online instructors' use of initiation and maintenance rapport-building strategies (RBS) on Chinese EFL learners' CALL motivation and cognitive load management. Mixed methods research was used to concurrently triangulate different strands of data on the effects of RBS on 86 randomly sampled EFL learners. The…

Chulalongkorn University Language Institute (CULI) test was developed as a local standardised test of English for professional and international communication. To ensure that the CULI test fulfils its intended purposes, this study employed Kane's argument-based validation and Rasch measurement approaches to construct the validity argument for the…

English learning contexts are typically categorized as English as a Second Language (ESL) and English as a Foreign Language (EFL). ESL pertains to English acquisition in regions where it is an official language, while EFL refers to contexts where it is not. Although previous research has examined written language differences among learners in L1…

Although research indicates that deliberate practice is indispensable for achieving high levels of proficiency and expertise in a range of disparate fields, this type of practice has largely been overlooked in the second language acquisition literature. To bridge this gap, and advocating for a more intentional and goal-directed approach to second…