a Academic progress by loneliness class for adolescents varying in support from friends. Note. Academic progress indicators (i.e., GPA, classes failed, math sequence, engagement) were standardized, and academic progress is the mean of the standardized indicators. High support from friends is 1 SD or more above the mean; low support is 1 SD or more below the mean. b Number of exit exams passed by loneliness class for adolescents varying in support from friends. Note. Range of exit exams passed: 0–2. High support from friends is 1 SD or more above the mean; low support is 1 SD or more below the mean