Examined conceptions of emerging adulthood among Argentinians in their middle twenties. Found wide support for individualistic criteria for adulthood, but also criteria suggesting more collectivistic values. Identified gender, social class origin, and educational attainment differences. Concluded that emerging adulthood is a distinct developmental period in Argentina on the basis of demographic diversity and the fact that most respondents felt that they had not yet reached adulthood. (Author/KB)