One of the main problems I encountered when brainstorming about my proposal was determining a way to measure social support.
Luckily I found an article describing the Social Support Questionnare (SSQ) which provides quantitative data about the amount and perceived quality of support received. The questionnaire asks about the number of people on whom one could receive support from in a variety of situations. It also asks participants to rank their satisfaction with this support. The numbers are then averaged to provide a singular score.
Sarason, I. G., Sarason, B. R., Shearin, E. N., & Pierce, G. R. (1987). A brief measure of social support: Practical and theoretical implications. Journal of Social and Personal Relationships, 4(4), 497-510.