Komplexität (kognitive) ; Complexity (cognitive) ; Multitasking; Cognitive complexity ; Zweitspracherwerb (Textproduktion) ; Second language acquisition (text production) ; Text production (second language acquisition) ; Speech perception (second language acquisition) ; Sprachperzeption (Zweitspracherwerb) ; Speech production/speech perception (second language acquisition) ; Schreibperformanz; Written composition (research on) ; French ; Italian