  We present results from a Monte Carlo simulation of the Nambu - Jona-Lasinio
model, with continuous SU(2)xSU(2) chiral symmetry, in four Euclidean
dimensions. Different model equations of state, corresponding to different
theoretical scenarios, are tested against the order parameter data. The results
are sensitive to necessary assumptions about the shape and extent of the
scaling region. Our best fits favour a trivial scenario in which the
logarithmic corrections are qualitatively similar to those predicted by the
large N_f approximation. This is supported by a separate analysis of finite
volume corrections for data taken directly in the chiral limit.

High Energy Physics - Lattice