Published online by Cambridge University Press: 29 December 2020
While written language development involves reducing erroneous expressions, traditional error-based measures are problematic for several reasons, including low inter-coder reliability for lexical errors, limited sensitivity for capturing development within a short time period, and the questionable separation of lexical and grammatical errors. Given these problems, we explore automated accuracy measures rooted in a usage-based theory of Second Language Acquisition, which views language as a set of constructions or chunks. For this study, we examined 139 essays in terms of using traditional measures of complexity, accuracy, lexical sophistication, and fluency, as well as novel corpus-based n-gram measures. A factor analysis was conducted to explore how traditional measures grouped with corpus-based measures, and regression analyses were used to examine how corpus-based measures predicted error counts and holistic accuracy scores. With the results of these analyses, we suggest that automated n-gram based measures are a viable alternative to traditional accuracy measures.
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