This study longitudinally examined the effects of cognitive and sociopsychological individual differences (aptitude, motivation, personality) and the quantity and quality of second language (L2) experience on L2 speech gains in naturalistic settings. We elicited L2 spontaneous speech from 50 Chinese learners of English at the beginning and the end…

Academic self-concept (ASC) is a student's self-perceived level of ability in an academic domain and a major factor involved in academic performance. We examined the importance of internal/external sources of evaluation for the structure of L2 and L3 ASCs in two groups of 5th/6th graders learning English and French in Switzerland (mean age: 12.1).…

Energy Conservation Theory of Second Language Acquisition (ECT-L2A) (Han, Bao, & Wiita, 2017b), an interdisciplinary theory juxtaposing a physics perspective and an applied linguistics perspective, conceptualizes individuals' ultimate attainment as a function of dynamic transformation of endogenous and exogenous energies throughout the…

The study focuses on the role of different theories when considered together in a foreign language other than English (LOTE) context. Specifically, the study examines (a) to what extent influential second language (L2) motivational theories, when integrated, explain motivation to learn LOTEs, and (b) how the powerful status of English in Japan…

This book presents original, empirical data from quantitative and qualitative research studies in the field of language learning aptitude, ability, and individual differences. It does so from the perspectives of Second Language Acquisition, psychology, neuroscience and sociolinguistics. All studies included in the book use a similar and uniform…