  Light scalar hadrons are often understood as dynamically generated
resonances. These arise as `companion poles' in the propagators of $q\bar{q}$
seed states when accounting for meson-loop contributions to the self-energies
of the latter. Following this idea, we demonstrate that for the
scalar--isovector state $a_{0}(1450)$ the full one-loop propagator has two
poles: a pole of the seed state $a_{0}(1450)$ and a companion pole
corresponding to $a_{0}(980)$. The positions of these poles are studied by
varying the relative coupling strength between the non-derivative and
derivative parts of the interactions.
