ESP; English for academic purposes; EAP ; English as a second language; ESL; TESOL ; Feedback (language teaching) ; Rückmeldung (Sprachunterricht) ; Lehrerkommentar; Teacher's comment; Correction (in language teaching) ; Selbstkorrektur; Repair (in discourse) ; Self-repair (in discourse) ; Correction (in discourse) ; Manager (language behavior) ; Führungskraft (Sprachverhalten) ; Rollenkonflikt (Kommunikationsforschung) ; Positioning theory; Role-specific communication ; Classroom communication; Instructional communication ; English as international medium ; Second language acquisition (pragm.) ; Zweitspracherwerb (pragm.) ; Interactionist hypothesis (second language acquisition) ; Conversational analysis (second language acquisition) ; English