In nationally representative samples of U.S. adolescents (age: 13–18) and entering college students, 1976–2017 ( N = 8.2 million), iGen adolescents in the 2010s (vs. previous generations) spent less time on in-person (face-to-face) social interaction with peers, including getting together or socializing with friends, going to parties, going out, dating, going to movies, and riding in cars for fun. College-bound high school seniors in 2016 (vs. the late 1980s) spent an hour less a day engaging in in-person social interaction, despite declines in paid work and little change in homework or extracurricular activity time. The results suggest that time displacement occurs at the cohort level, with in-person social interaction declining as digital media use increased, but not at the individual level, where in-person social interaction and social media use are positively correlated. Adolescents’ feelings of loneliness increased sharply after 2011. Adolescents low in in-person social interaction and high in social media use reported the most loneliness.

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