Study Effect sizes (N) Instruments Timepoints
Griffiths 2016 15 BDI, GRID-HAM-D, HADS-D 5 weeks after session 1, 5 weeks after session 2, 6 months
Ross 2016 26 BDI, HADS-D 1 day pre-dose 1, 1 day post-dose 1, 2 weeks post-dose 1, 6 weeks post-dose 1, 7 weeks post-dose 1 and 1 day pre-dose 2, 6 weeks post-dose 2, 26 weeks post-dose 2
Davis 2021 7 BDI, QIDS-SR, GRID-HAM-D, PHQ-9 Week 5, Week 8
Goodwin 2022 81 QIDS-SR, MADRS Week 3, Week 12, Day 2, Week 1, Week 6, Week 9, Week 3-12 Sustained Response
Raison 2023 22 MADRS, SMDDS Day 2, Day 8, Day 15, Day 29, Day 43, Days 8-43 Sustained Response
von Rotz 2023 14 BDI, MADRS Day -1, Day 0, Day 2, Day 8, Day 14
Back 2024 2 MADRS Day -8, Day 28
Rosenblat 2024 6 MADRS Day 1, Day 7, Day 14
Rieser 2025 6 BDI Day -14, Day 1, Day 14, Day 30, Day 96, Day 190
Grob 2011 3 BDI 1 day before experimental session, 1 day after experimental session, 2 weeks after experimental session
Carhart-Harris 2021 16 QIDS-SR, HAM-D-17, BDI-1A, MADRS Week 6
Krempien 2023 3 MADRS Day 21

eTable 5: List of effect sizes compiled in the full database released through Metapsy. Timepoints here are verbatim references to the text used in the study reports.