The neural and cognitive effects of psilocybin in a naturalistic retreat setting - base registration

In "retreat_ap2eg_overall_preregistration.pdf", a registration of the overall project is given, including all hypotheses of all study components and information shared between them. The preregistration follows the template at https://osf.io/preprints/metaarxiv/epgjd/ and includes the sections "Study Information", "Design Plan" and "Sample Plan". The sections "Variables" and "Analysis Plan" are omitted here, but will be specified for each study component seperately in their individual preregistration documents.