| cAIC4-package | Conditional Akaike information criterion for lme4 |
| cAIC | Conditional Akaike Information for 'lme4' |
| deleteZeroComponents | Delete random effect terms with zero variance |
| getcondLL | Function to calculate the conditional log-likelihood |
| guWahbaData | Data from Gu and Wahba (1991) |
| stepcAIC | Function to stepwise select the (generalized) linear mixed model fitted via (g)lmer() or (generalized) additive (mixed) model fitted via gamm4() with the smallest cAIC. |