Model                                     AIC       deltaAIC        AIC wgtModel Likelihood        no.Par.     -2*LogLike
psi(.),p(.)                            114.88           0.00         0.5560         1.0000              2         110.88
psi(gully),p(.)                        115.33           0.45         0.4440         0.7985              3         109.33
