Department of Psychology, University of Tennessee, USA.
J Couns Psychol. 2012 Jan;59(1):150-60. doi: 10.1037/a0026549.
This study examined a threshold model that proposes that social support exhibits a curvilinear association with adjustment and distress, such that support in excess of a critical threshold level has decreasing incremental benefits. Women diagnosed with a first occurrence of breast cancer (N = 154) completed survey measures of perceived support (Social Provisions Scale), quality of life (Functional Living Index--Cancer), adjustment (Psychological Adjustment to Illness Scale) and psychological distress (Brief Symptom Inventory) approximately 3 weeks after surgical treatment and 8-16 months later. Consistent with a threshold model, multiple regression analyses suggested a significant curvilinear relationship between social support and distress at Time 1 and Time 2 and between social support and adjustment at Time 2. Consistent with this model, the significant bivariate correlations between social support and outcomes were accounted for almost entirely by women in the lowest quartile of support. Social support among women in the highest 3 quartiles was unrelated or only marginally related to adjustment and distress.
本研究检验了一个阈模型，该模型提出社会支持与适应和困扰呈曲线关系，即支持超过临界阈值水平后，其增量收益逐渐减少。本研究纳入了 154 名首次被诊断患有乳腺癌的女性患者，她们在手术后大约 3 周和 8-16 个月后完成了感知支持（社会支持量表）、生活质量（癌症功能生活指数）、适应（疾病心理调整量表）和心理困扰（简明症状量表）的调查评估。与阈模型一致，多元回归分析表明，在第 1 次和第 2 次随访时，社会支持与困扰之间，以及在第 2 次随访时，社会支持与适应之间呈显著的曲线关系。与该模型一致，支持与结局之间的显著双变量相关性几乎完全由支持水平最低四分位数的女性所解释。支持水平处于最高四分位数的女性的社会支持与适应和困扰无关或仅有微弱关联。
