Model                                     AIC       deltaAIC        AIC wgtModel Likelihood        no.Par.     -2*LogLike
psi(.),p(.)                             78.51           0.00         0.6225         1.0000              2          74.51
psi(gully),p(.)                         79.51           1.00         0.3775         0.6065              3          73.51
