Needs assessment (language teaching) ; English as a second language; ESL; TESOL ; Hörersteuerung; Rückmeldesignal; Kontaktsignal; Aizuchi; Active listening; Back channel ; Strategie (pragm.) ; Strategy (pragm.) ; Speaker strategy (pragm.) ; Norm of interaction; Regel (pragm.) ; Rule (pragm.) ; Interactional norm ; Interference (pragm.) ; Cross-cultural pragmatics; Pragmatics, cross-cultural; Pragmatik, interkulturelle; Intercultural communication ; E-Mail; Voice mail; Chat; Computer-mediated communication ; Second language acquisition (pragm.) ; Zweitspracherwerb (pragm.) ; Interactionist hypothesis (second language acquisition) ; Conversational analysis (second language acquisition) ; Transfer (second language acquisition) ; Transfer (Zweitspracherwerb) ; Cross-linguistic influence (second language acquisition) ; Interference (second language acquisition) ; Vermeidungsstrategie (Zweitspracherwerb) ; Avoidance strategy (second language acquisition) ; Ersatzstrategie (Zweitspracherwerb) ; Compensatory strategy (second language acquisition) ; Speaker strategy (second language acquisition) ; English (American) ; USA (English language in the) ; USA (engl. Sprache in den) ; English in the USA; Englisch in den USA; American English ; Japanese