Systems thinking is currently envisaged as a useful educational approach to teaching about sustainability (including green chemistry education) because of the high number of interrelated factors involved and the need of learners to acquire the ability to identify all of the factors and their relationships. After recalling the way in which key…

This study compares two leadership styles, emergent leader (EL) and assigned leader (AL), to explore effective leadership in second language (L2) group work. ELs were spontaneously chosen by the group, while ALs were pre-assigned by teachers before the task. The study involved 45 university students, who were divided into seven EL groups (n = 21)…

As a social-interactional positive behavior, the flow of compassion (i.e., selfcompassion, compassion for others, and compassion from others), which refers to sensitivity to suffering in self and others with a commitment to try to alleviate and prevent it, has yet to be investigated in a highly social-interactional context such as foreign language…

Purpose: The purpose of this study is to examine the formation of sustainable development competencies (SDCs) in future primary school teachers during English for specific purposes classes, and to assess the correlation between English proficiency and the development of SDCs, including Collaboration, Strategic thinking, Critical thinking,…

This study investigated phase transitions in EFL students' speech fluency development using a complex dynamic systems perspective. Two students with different proficiency levels were selected from an intact speaking class. These students learned and practiced specific strategies to improve their speech fluency. Phase transitions were analyzed…

Language repertoires have been traditionally construed as a set of chronologically determined compartments (first language, second language, etc.), a scheme which upholds several validity and ethical issues when operationalized in research and education (Ortega, 2019). Complex dynamic systems theory (also complexity theory, here CDST) has been…

The English language is a catalyst for economic growth, modernization, and globalization. In this milieu, English language competency--defined as the practical ability to use English effectively in diverse contexts, encompassing linguistic, cognitive, and intercultural skills--is recognized as an essential skill (Amor et al., 2023). Research on…

Guided by Dynamic Systems Theory (DST) and multidimensional perspectives on individual differences (IDs) in instructed second language (L2) learning (e.g., Larsen-Freeman, 2014; Sun & Zhang, 2020), this longitudinal mixed-methods study focuses on three conceptually different categories of L2 learners' IDs: working memory (WM), motivation, and…

This longitudinal mixed-methods case study aimed to explain why a seemingly ordinary U.S.-affiliated hyper-connected French language learner (Nancy) achieved extraordinary outcomes after 15 weeks in Paris, compared to fifteen Generation Z peers also enrolled in the program. Framed by Complex Dynamic Systems Theory and social pedagogies, the study…

Drawing on qualitative research, this study explores (1) how Hong Kong university students' existing L1 and L2 affect their learning motivation for an L3 and (2) how an individual's L2 motivation changes because of learning an L3, from a dynamic systems theory perspective. Eight undergraduate students from Hong Kong participated in this study.…

The question of cognition in second language (L2) acquisition later in life is of importance inasmuch as L2 learning is largely mediated by domain-general cognitive capacities. While a number of these capacities have been shown to decline with age, individual differences in cognition increase over the lifespan. This microdevelopment study…

There is quite a bit of evidence showing that the experience of learning an L2 will help in learning an L3, but as far as we know, very little research has investigated the possible impact of L3 learning on the already existing and still developing L2 system within the learner. According to Complex Dynamic Systems Theory (CDST), language…

One of the most recent developments in the field of L2 motivation is the construct of Directed Motivational Currents (DMCs). This novel motivational conceptualisation is characterised by its energising capacity to promote and sustain action in a multitude of contexts whenever an individual is determined to attain a goal/vision he or she regards as…

This dissertation investigates the longitudinal development of Chinese language proficiency among students in a Chinese as a Foreign Language (CFL) Flagship Program at an American public university from 2014 to 2024. Using Bayesian multilevel regression models, this study assesses the trajectories of listening, speaking, and reading proficiency…

This book examines the role of interlocutors and their individual differences (IDs) in second language (L2) development from four theoretical lenses: the cognitive-interactionist approach, sociocultural theory, the variationist approach, and complex dynamic systems theory. A theoretical overview to each approach is written by a preeminent scholar…