Model                                     AIC       deltaAIC        AIC wgtModel Likelihood        no.Par.     -2*LogLike
psi(.),p(.)                            204.02           0.00         0.7027         1.0000              2         200.02
psi(gully),p(.)                        205.74           1.72         0.2973         0.4232              3         199.74
