There is a need to identify the outcomes of changes in loneliness during adolescence, and to consider this within a multidimensional framework of loneliness. This study considered the effects of different trajectories of change in Isolation Loneliness and in Friendship Loneliness upon both positive wellbeing and symptoms of depression. To achieve this, 1782 (43% female; 12.92 years old at the start of the study, SD = 1.60) young people took part in a longitudinal study with four data points across 2 years. Four Isolation Loneliness trajectories and five Friendship Loneliness trajectories were identified. Youth who experienced low levels of Isolation Loneliness that subsequently increased appear to be at particular risk for poor outcomes. Similarly, initially high levels of Friendship Loneliness that decreased rapidly, or which began at a low level and only increased marginally, seem to also be a risk. Loneliness is a multi-dimensional construct and its development during adolescence impacts upon young people’s depressive symptomatology and positive mental wellbeing.

有必要确定青春期孤独感变化的结果，并在孤独感的多维框架内考虑这一点。这项研究考虑了孤立孤独感和友谊孤独感的不同变化轨迹对积极幸福感和抑郁症状的影响。为了实现这一目标，1782 名（43% 为女性；研究开始时年龄为 12.92 岁，SD = 1.60）年轻人参加了一项为期 2 年、包含四个数据点的纵向研究。确定了四个孤立孤独轨迹和五个友谊孤独轨迹。经历过较低水平的孤立孤独感并随后增加的青少年似乎特别容易面临不良结果的风险。同样，最初高水平的友谊孤独感迅速下降，或者开始时水平较低且仅略有增加，似乎也是一种风险。孤独是一种多维的建构，它在青春期的发展会影响年轻人的抑郁症状和积极的心理健康。