“…Previous research focuses mainly on oral interaction (e.g., Gan, 2010 ; Nakatsuhara et al, 2021 ; Zhang and Jin, 2021 ), whereas written interaction has received less attention ( Abe and Roever, 2019 ; Abe, 2021 ). In addition, scholars have mainly addressed synchronous interaction tasks, such as oral interviews and paired discussion tasks (e.g., Galaczi, 2014 ; Youn, 2020 ), while research on asynchronous written interaction tasks remains rather limited. As existing research findings on synchronous interaction may not necessarily be generalizable to asynchronous interaction, further investigation is needed to attain a more comprehensive understanding of interactional competence.…”