  As a consistency check of the staggered-fermion fourth-root approximation, we
analyze the a_0 and f_0 correlators, including the effects of two-meson
taste-multiplet intermediate states. Rooted staggered chiral perturbation
theory describes the contributions from the pseudoscalar taste multiplets in
terms of only a few low energy constants, which have all been previously
determined by the MILC collaboration. In previous work one of us (Prelovsek)
showed that the two-meson ``bubble'' contributions could explain the observed
anomalies in the lattice data for the isovector a_0 channel. In the present
work we extend this analysis to the f_0 channel. On a MILC collaboration
lattice ensemble at 0.12 fm with 2+1 flavors of Asqtad-improved staggered
fermions, we have made new measurements of correlators in both channels for a
variety of momenta. A fit to these correlators gives low energy constants that
are reasonably consistent with previous determinations by the MILC
collaboration.}
