Model                                     AIC       deltaAIC        AIC wgtModel Likelihood        no.Par.     -2*LogLike
psi(.),p(.)                            286.11           0.00         0.5474         1.0000              2         282.11
psi(gully),p(.)                        286.49           0.38         0.4526         0.8270              3         280.49
