Using the second-order Eulerian perturbation theory (SEPT), we study t
he three-point correlation function zeta in the quasilinear regime for
the SCDM, LCDM and MDM models, with the interesting result that these
three models have distinctive three-point correlation functions. We t
est this SEPT prediction using a large set of high-resolution N-body s
imulations. The N-body results show that the SEPT prediction for zeta
is not accurate even in the quasilinear regime (r less than or similar
to 10 h(-1) Mpc), in contrast to previous N-body tests on the skewnes
s. However, similar to the perturbation theory, our N-body results sti
ll predict a strong dependence of the three-point correlation on the t
riangle shape which is observable in the distribution of galaxies if t
he galaxies trace the distribution of the underlying mass.