Eta-squared (?[superscript 2]) and partial eta-squared (?[subscript p][superscript 2]) are effect sizes that express the amount of variance accounted for by one or more independent variables. These indices are generally used in conjunction with ANOVA, the most commonly used statistical test in second language (L2) research (Plonsky, 2013).…

By its nature, AW [academic writing] represents adversity compared to other types of writing. It owns the characteristics of more notable patterns and language usage compared to other writing styles such as literary works, news, etc. Without discriminating the language used, this kind of writing generally bears similarities across languages due to…