  The theory and methodology is developed to compute the bispectrum in warm
inflation, leading to results for the non-linearity parameter and the shape of
the bispectrum. Particular attention is paid to the study of the bispectrum in
the regime of weak dissipation and how stochastic fluctuations affect the
bispectrum. It is shown that, in contrast to the strong dissipative regime, the
amplitude of non-Gaussianity is strongly dependent on the parameters governing
the microscopic physics in the intermediate and weak dissipation warm inflation
regimes. The most important results concern the shape of the bispectrum, which
has two different, but distinct, forms in the weak and strong dissipative
regimes. Comparison of shape functions could permit discrimination between the
warm and cold paradigms of inflation from future precision data on primordial
non-Gaussianity.
