Error analysis (language teaching) ; DaF; Deutsch als Zweitsprache; German as a second language; DaZ; German as a foreign language ; Feedback (language teaching) ; Rückmeldung (Sprachunterricht) ; Lehrerkommentar; Teacher's comment; Correction (in language teaching) ; Selbstkorrektur; Repair (in discourse) ; Self-repair (in discourse) ; Correction (in discourse) ; Classroom communication; Instructional communication ; Metalinguistic awareness; Phonologische Bewusstheit; Phonological awareness; Focus on form (language teaching) ; Sprachbewusstsein; Linguistic awareness ; Second language acquisition (pragm.) ; Zweitspracherwerb (pragm.) ; Interactionist hypothesis (second language acquisition) ; Conversational analysis (second language acquisition) ; Second language acquisition (psycholing.) ; Negative evidence (second language acquisition) ; Feedback (second language acquisition) ; German