Dear SPMlers, We are following the DCM protocol for analyzing our data and currently select the best fitting model. We therefore wanted to apply the Bayesian model selection for post hoc inferences as described by Friston & Perry, 2011. In the appendix the authors describe the key routines used in post hoc model selection: "This appendix describes the key routines used in post hoc model selection and optimization currently available in our academic freeware. These are available as MATLAB scripts from (http://www.fil.ion.ucl.ac.uk/spm). spm_dcm_post_hoc: Post hoc optimization (under Laplace approximation)." However, we are not able to find the MATLAB scripts available on the SPM homepage. Any help is greatly appreciated, Carolin