Although many studies have examined the relationship between individual linguistic features and L2 writing quality (e.g., Biber & Gray, 2013; Crossley & McNamara, 2012; Grant & Ginther, 2000), fewer have investigated how features co-occur to form distinct profiles in highly successful writing (see Friginal et al., 2014, Jarvis et al., 2003). Adopting a profile-based approach, this study explores patterns of co-occurring linguistic features in advanced L2 writing. A total of 925 argumentative essays rated at CEFR C1 or C2 were drawn from the International Corpus of Learner English (ICLE v3) and analyzed using cluster analysis on 25 linguistic features. The analysis produced a three-cluster solution, each defined by unique combinations of lexical, phrasal, and clausal features. The resulting profiles demonstrate that advanced-level success can be achieved through multiple pathways: a stance-oriented style emphasizing hedging and impersonality, an accessible narrative-like style highlighting engagement and personal voice, and a dense informational style marked by nominalizations and complex noun phrases. These findings underscore the value of the profile approach and highlight multiple linguistic routes to high-quality writing. Pedagogical and assessment implications include moving beyond singular models of writing quality to recognize stylistic diversity among advanced L2 writers.
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