Needs assessment (language teaching) ; English as a second language; ESL; TESOL ; Lernmotivation; Affekt (Einfluss auf Zweitspracherwerb) ; Affect (influence on second language acquisition) ; Motivation research ; Wortschatz (Sprachunterricht) ; Lernwortschatz; Vocabulary teaching ; Zweitspracherwerb (lex.) ; Second language acquisition (lex.) ; Vocabulary (second language acquisition) ; English