Katarzyna Rokoszewska - Böcker

This book examines intra-individual variability and inter-individual variation in the emergence of syntactic complexity, accuracy, lexical complexity, and fluency (CALF) in L2 English writing at secondary school from the perspective of complex dynamic systems theory (CDST). It presents a mixed-method study based on the Written English Developmental Corpus of Polish Learners (WEDCPL), which consists of over 1900 texts written by 100 learners during 21 repeated measurements conducted over a period of three years at secondary school. The study provides both group and individual data on language development, dynamic relationships between selected variables, significant peaks and phase transitions in language development, patterns of intra-individual variability, the growth rate of language development, and the relationship between intra-individual variability and the average semester growth rate of language development. The book is addressed to SLA researchers, methodologists, foreign language teachers, and students.

The book presents the process of first and second language acquisition in children as well as the main principles of conventional and unconventional approaches and methods implemented in the general education as well as the language education of children. The long-term quantitative study described focused on the comparison of the results obtained by young learners taught English according to the Helen Doron Method in private courses and the results gained by young learners instructed according to the modern eclectic method at public primary school. The results were compared in such language areas and skills as vocabulary, grammar, language chunks, pronunciation, listening skill, speaking skill and a general level of language acquisition.