Evidence of the validity of the Multidimensional Scale of Perceived Social Support (MSPSS) in university students

Abstract Social support refers to the social resources that a person perceives to be available and has been strongly associated with physical and mental health outcomes. The present study aimed to evaluate the internal consistency, construct validity, and test-retest reliability of the Perceived Social Support Multidimensional Scale (PSSMS) in university students in the Midwest of Brazil. Exploratory and confirmatory factor analyses were performed with two independent random samples, both consisting of 1,147 students. The test-retest study was carried out with a sample of 347 medical students. Data were collected in two separate moments with a 14-day interval. The solution with the best fit was the three-factor model: family, friends, and significant others. The factor loadings of the scale items ranged between 0.767 and 0.950 and each factor showed high internal consistency (Cronbach’s alpha=0.96, 0.97, and 0.97, respectively). The model also attained adequate fit: χ2(d.f.)=380 (49), p摘要 社会支持指个体所感知到的可用社会资源，且该资源与身心健康结局显著相关。本研究旨在评估多维感知社会支持量表（Perceived Social Support Multidimensional Scale, PSSMS）在巴西中西部大学生中的内部一致性、结构效度及重测信度。研究采用两份独立的随机样本开展探索性与验证性因子分析，每份样本均包含1147名大学生。本重测研究纳入347名医学生作为研究样本，数据分两次独立采集，间隔时长为14天。拟合效果最优的模型为三因子结构，分别对应家庭支持、朋友支持及重要他人支持。量表各条目因子载荷介于0.767至0.950之间，各因子均表现出优异的内部一致性（克朗巴赫α系数分别为0.96、0.97及0.97）。该模型同样具备良好的拟合度：χ²(自由度)=380(49)，p