  We study how the scalar mesons below 1 GeV are generated through the
Oller-Oset-Pelaez version of the multichannel inverse amplitude method applied
to the chiral perturbation theory. We find out that the f0(980) state is
certainly generated as a bound state resonance below the K-Kbar threshold,
while the a0(980) state, generated through the channel coupling between the
pi-eta and K-Kbar channels, appears as a cusp at the K-Kbar threshold. The
so-called sigma(500) and kappa(900) need not be interpreted as the conventional
resonances.
