Measures of variability in transitional phases in second language development

Abstract This paper investigates measures of change to help demonstrate the necessity variability as a developmental mechanism for advancing different features L2 learning (related here primarily writing, but also reading) with particular focus on learners at stages development. To do so, work draws three studies build case using meaningful marker change. Lowie, Wander M. & Marjolijn Verspoor. 2019. Individual differences and ergodicity problem. Language Learning 69. 184–206 found in group 22 Dutch English that Coefficient Variation (CoV), rather than individual factors such motivation aptitude, showed significant correlation writing proficiency gains. A replication study by Huang, Ting, Rasmus Steinkrauss 2020b. Variability predictors proficiency. Journal Second Writing , Chinese revealed CoV motivation, aptitude or working memory was predictor Gui, Min, Xiaokan Chen Submitted. The dynamics reading development Academic Purposes, academic purposes 27 Chemistry majors Standard Deviation (SDd) knowledge correlated Two further present tentative evidence these changes take place especially transitional phases while new skill.