  One of the crucial aspects of density perturbations that are produced by the
standard inflation scenario is that they are Gaussian where seeds produced by
topological defects tend to be non-Gaussian. The three point correlation
function of the temperature anisotropy of the cosmic microwave background
radiation (CBR) provides a sensitive test of this aspect of the primordial
density field. In this paper, this function is calculated in the general
context of various allowed non-Gaussian models. It is shown that by COBE and
the forthcoming South Pole and Balloon CBR anisotropy data may be able to test
provide a crucial test of Gaussianity.
