The current paper explores adult friendship and its relation to satisfaction with life and loneliness during established adulthood and midlife. The sample (n = 124) consisted of 59 established adults (30–45 years) and 65 midlifers (46–65 years), with the majority of participants characterized as White, middle-income, and female. Participants completed the Network of Relationships-BSV scale (Furman and Buhrmester, International Journal of Behavioral Development 33:470–478, 2009) to measure friendship quality, the Satisfaction with Life Scale (Diener et al., Journal of Personality Assessment 49:71–75, 1985) to measure one’s global sense of life satisfaction, and the UCLA Loneliness Scale (Russell, Journal of Personality Assessment 66:20–40, 1996) to measure participants’ level of loneliness. Results suggest that friendship plays a more central part in the lives of those in midlife compared to those in established adulthood and that loneliness is higher in established adulthood than in midlife. There were no significant differences in satisfaction with life for the two groups. Implications of the findings are discussed with regard to the middle adult years as two distinct age frames.

目前的论文探讨了成人友谊及其与成熟的成年和中年期间的生活满意度和孤独感的关系。样本（n = 124) 包括 59 名成熟的成年人（30-45 岁）和 65 名中年人（46-65 岁），大多数参与者的特征是白人、中等收入和女性。参与者完成了关系网络-BSV 量表（Furman 和 Buhrmester，International Journal of Behavioral Development 33:470–478, 2009）来衡量友谊质量、生活满意度量表（Diener 等人，Journal of Personality Assessment 49:71 –75, 1985) 来衡量一个人的全球生活满意度，以及加州大学洛杉矶分校孤独感量表 (Russell, Journal of Personality Assessment 66:20–40, 1996) 来衡量参与者的孤独感水平。结果表明，与已成年的人相比，友谊在中年人的生活中发挥着更重要的作用，而且成年后的孤独感高于中年人。两组对生活的满意度没有显着差异。研究结果的影响将中年作为两个不同的年龄框架进行了讨论。