Language testing ; Evaluation criterion (language testing) ; Role play (language teaching) ; Stem completion; Wortergänzungsaufgabe ; Second language acquisition (pragm.) ; Zweitspracherwerb (pragm.) ; Interactionist hypothesis (second language acquisition) ; Conversational analysis (second language acquisition) ; Zweitspracherwerb (Textproduktion) ; Second language acquisition (text production) ; Text production (second language acquisition) ; Korean