Resumen:
The COVID-19 pandemic has had a significant negative impact on the mental health and psychosocial well-being of the general population, but little attention has been paid to the social support available to people to cope with such adverse conditions. Objective. To examine the psychometric properties of the MOS Perceived Social Support Questionnaire in the Mexican population in the context of the COVID-19 pandemic. Method. Non-experimental cross-sectional study. A sociodemographic questionnaire and the Medical Outcomes Study (MOS) were applied in a non-probabilistic sample. A total of 898 people from different regions of Mexico (Mage = 34.85, SD = 11.37, Females = 640, Males = 258) participated in the study. Results. The analysis yielded a bifactor model with two factors (F1. Emotional/informational support, F2. Tangible support) with satisfactory goodness of fit indices (χ2 = 486.36; df = 88; p = .000; RMSEA = .071 [IC90% .065 – .077]; SRMR = .02; CFI =.99; TLI =.99). Reliability was adequate with a high hierarchical omega coefficient (.95), as well as on the factors (F1 ωhs = .03, F2 ωhs = .28). Likewise, the H coefficient was adequate in the general factor and its dimensions (HHG = 98; Hhs = .28; Hhs = .56). Discussion and conclusion. Results showed that the scale is a valid and reliable measure of perceived social support in the Mexican population.