・UIC study details how today’s high school cliques compare to yesterday’s https://today.uic.edu/uic-study-details-how-todays-high-school-cliques-compare-to-yesterdays
(Modern high school peer crowd hierarchy (Image by Rachel A. Gordon, Ph.D., Anna Dworzecka, 2018)) https://today.uic.edu/files/2018/10/pyramid_4_c_sm.jpg