  Two different descriptions of the existing pion-nucleon scattering data in
the region of the Roper resonance are constructed. Both descriptions fit the
experimental data very well. In one scenario the resonance is the result of
strong rescattering between coupled meson-baryon channels, while in the other
scenario, the resonance has a large bare-baryon (or quark-model like)
component. The predictions of these two scenarios are compared with the latest
lattice QCD simulation results in this channel. Consideration of the finite
volume spectra, the manner in which the states are excited from the vacuum in
lattice QCD and the composition of the states in Hamiltonian effective field
theory enable a discrimination of these two different descriptions. We find the
second scenario is not consistent with lattice QCD results whereas the first
agrees with the lattice QCD constraints. In this scenario, the mass of the
quark-model like state is approximately 2 GeV and in the finite volume of the
lattice is dressed to place the first radial excitation of the nucleon at 1.9
GeV. Within this description, the infinite-volume Roper resonance is best
described as a resonance generated dynamically through strongly coupled
meson-baryon channels.
