Language testing ; English as a second language; ESL; TESOL ; Lexical complexity measure; Wortschatzreichtum; Lexical sophistication; Lexical diversity; Type-token ratio (lex.) ; Erzählen (kommunikative Funktion) ; Story telling (communicative function) ; Narratives (pragm.) ; Story telling (pragm.) ; Lexical choice ; Second language acquisition (pragm.) ; Zweitspracherwerb (pragm.) ; Interactionist hypothesis (second language acquisition) ; Conversational analysis (second language acquisition) ; Zweitspracherwerb (lex.) ; Second language acquisition (lex.) ; Vocabulary (second language acquisition) ; English