AUTHOR=Şahin Ekrem Sedat TITLE=From ambition to substance use tendency: the mediating role of significance quest JOURNAL=Frontiers in Psychology VOLUME=16 YEAR=2025 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2025.1496907 DOI=10.3389/fpsyg.2025.1496907 ISSN=1664-1078