TY JOUR TI Why one can't «motivate teenagers to study»: existential and academic motivation of adolescents aged 15–16 KW teenagers KW school motivation KW existential motivation KW interrelation KW internal dialogue KW age characteristics JO THE TERRITORY OF NEW OPPORTUNITIES OPENS FOR INVESTMENT PROJECTS OF THE FUTURE AU Chernyavskaya, V.S. PY 2025 IS 16 PB Vladivostok State University