Previous research has suggested that the attitudinal and frequency dimensions of social support are independent. To examine the stability of support, the effects of support on depressive symptomatology, and the effects of depressive symptomatology on support over a 1-month period, 112 college students completed the Beck Depression Inventory, the Center for Epidemiological Studies-Depression Scale, the Self-Rating Scale for Depression, and an attitudinal measure of support. Analyses were done in the framework of latent variable structural equation models in which latent variable constructs, the social support construct, and frequency measures were examined longitudinally. The results illustrated that social support encompasses both qualitative (attitudinal) and quantitative (frequency) notions, suggesting that these are dependent dimensions of support. In the context of examining the effects of support on depression/distress over 1 month, it was shown that the effect was not statistically significant from zero, although the within-time correlation between these two constructs was high. Finally, a small but significant effect was found linking distress/depression and self-reported social support behaviors over a period of 1 month in this sample. (BL)