The goal of this study was to identify mechanisms associated with chronic loneliness by examining the effect of adolescents' accumulated history of loneliness on responses to new social situations. Specifically, this study investigated whether attributions and emotions in situations of social inclusion and exclusion differ between chronically lonely adolescents and adolescents with a different loneliness history. A total of 730 adolescents (Mage at Wave 1 = 15.43 years) participated in a 4-wave longitudinal study with annual loneliness assessments. A chronic loneliness trajectory was identified, in addition to low-stable, moderate-stable, moderate-increasing, and high-decreasing loneliness trajectories. At Wave 4, vignettes depicting social inclusion and exclusion were presented, and participants rated a set of attributions and emotions following each vignette. Compared with individuals following other trajectories, chronically lonely adolescents were characterized by hypersensitivity to social exclusion (i.e., higher levels of negative emotions) and hyposensitivity to social inclusion (i.e., lower levels of enthusiasm). Further, chronically lonely adolescents had a stronger tendency to attribute social inclusion to circumstantial factors and social exclusion to internal and stable characteristics. This maladaptive attribution style partially mediated their emotional experiences. Together, results indicate that chronically lonely individuals respond to social situations in ways that may perpetuate rather than reduce their loneliness.

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The goal of this cross-sectional, correlational study was to evaluate (a) whether beliefs about stress as enhancing versus debilitating (i.e., stress mindsets) vary across sources of stress that differ in duration (acute vs. chronic) and controllability, and (b) how general and source-specific stress mindsets relate to health and academic performance. College students (n = 498) self-reported their general and source-specific stress mindsets, perceived distress, health, coping, and GPA. Stress mindsets varied as a function of duration and controllability, and general stress mindsets were only weakly associated with source-specific mindsets. Consistent with previous research, general stress mindsets were associated with health, but some source-specific mindsets were more predictive of health than others—viewing stress from chronic controllable sources as debilitating was most predictive of poor mental and physical health. Measures of stress were also associated with health, and this association was moderated by stress mindsets, suggesting that viewing stress as enhancing can provide a psychological “buffer” against the negative effects of stress. Approach coping and perceived distress were examined as potential mediators of the links between stress mindset and health. Viewing stress as enhancing was related to greater use of approach coping and lower perceived distress, which in turn was related to better health. This research suggests that stress mindset interventions may benefit students’ health, and that interventions targeting mindsets for chronic controllable sources of stress may be more effective than general stress mindset interventions.