  The chiral transition for two-flavor QCD is predicted to be in the same
universality class as the 3d O(4) model. This prediction is verified in the
Wilson case, but not for the staggered-fermion case. The comparison is usually
done assuming infinite-volume behavior. Here we make an analysis of existing
staggered-fermion data using finite-size scaling and normalizing the QCD data.
We find better agreement for larger quark masses.
