Mark Groeneveld
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mgroeneveld.bsky.social
Mark Groeneveld
@mgroeneveld.bsky.social
Writing "Open MDMA: An Evidence-Based Synthesis, Theory, and Manual for MDMA Therapy Based on Predictive Processing, Complex Systems, and the Defense Cascade" https://osf.io/preprints/psyarxiv/aps5g
I'm curious for people's view on whether 1) complex trauma, including non-secure attachment, explains most of the risk of MDMA-therapy-induced destabilization (assuming the therapist/guide is competent, ethical, and well-matched), and 2) how easy that risk factor is to assess.
October 29, 2025 at 7:56 PM
I finally have a mostly complete first draft of my MDMA therapy book/manual! It's built on predictive-processing/memory-reconsolidation, complex systems dynamics, and the defense cascade model of autonomic threat responses. I'd love any feedback anyone would like to offer.
OSF
osf.io
July 30, 2025 at 1:39 PM
Does anyone know why there is so much caution around mixing MDMA with a history of psychosis or mania, when there aren't that many case reports of MDMA inducing psychosis (and none that I could find of mania), and a large majority of those involve confounding factors not present in therapy?
July 15, 2025 at 1:10 AM
Huh. The MAPP1&2 long term follow-up found that those who got MDMA were much more likely to have gotten (Or were currently getting during the trial? It's unclear.) vaccinated or use psychiatric medications than those who got placebo. Page 88.
www.fda.gov/media/179062...
www.fda.gov
June 20, 2025 at 1:23 AM
This article makes a good case that there is little evidence for a physiological placebo effect. I'm sure, if correct, that there is still a place for placebos changing beliefs, including mental illness (in the predictive processing model).
A Case Against the Placebo Effect
The picture that emerges is that a placebo pill has almost no effect when administered by researchers who do not care about the placebo effect, but the exact same pill has an enormous effect larger…
carcinisation.com
May 19, 2025 at 9:49 PM
The push for psychedelic therapy trials to address unblinding is good. But my impression is that the large majority of all mental health interventions rely on trials with poor blinding. Should we not recommend psychotherapy, exercise, all psychiatric drugs with noticeable effects, etc?
May 14, 2025 at 2:29 PM
Does anyone know of instances of mdma therapy reconsolidating healthy avoidance-of-danger priors (e.g. not touching hot stoves, walking into solid objects, etc)?
April 16, 2025 at 2:13 PM
Has anyone heard of anyone successfully or unsuccessfully using naltrexone during MDMA therapy to reduce dissociation?
March 3, 2025 at 11:35 PM
I think LaTeX’s biggest downsides, its complexity and confusing compile errors, are not a major problem any more. LLM’s like Claude can now solve most of your errors or tell you how to do what you want. I feel so much better writing in LaTeX than Word now.
January 27, 2025 at 2:34 PM
Does anyone know of a “following” feed where politics/activism posts from people i already follow are filtered out? Is that possible? I sympathize but it’s exhausting and useless for me to get outraged about things I largely cant do anything more than I’m already doing to change.
January 25, 2025 at 9:05 PM
MDMA sometimes seems to act as a universal source of prediction error for any maladaptive prior. Sometimes this is because MDMA is facilitating non-dual awareness, which can contradict most or all maladaptive priors. Is this how it always works though? Is everyone getting glimpses of non-dualness?
December 26, 2024 at 4:44 PM
I don’t think capacity for memory reconsolidation is straightforwardly improvable. I’ve done 2 hours of MR every day —up to my exhaustion limit— for the past 14 months and haven’t seen any increase in the amount of time I can do it before exhaustion sets in.
December 22, 2024 at 12:32 AM
www.lesswrong.com/posts/i9xyZB... convinced me that 1) Most mental illness is caused by maladaptive emotional learnings or beliefs (often unconscious) 2) Prediction Error/Memory reconsolidation is the fundamental mechanism of permanently updating those beliefs.
Book summary: Unlocking the Emotional Brain — LessWrong
If the thesis in Unlocking the Emotional Brain is even half-right, it may be one of the most important books that I have read. It claims to offer a n…
www.lesswrong.com
December 3, 2024 at 4:53 PM
My consistent experience with MDMA therapy was that the medicine provides a universal mismatch that reconsolidates/unlearns seemingly any possible maladaptive schema/pattern. It skipped straight to the fundamental neural mechanism (MR) of therapy; no need for a framework like CBT, IFS, etc.
November 26, 2024 at 11:33 PM
1) My coauthor Thomas and I are writing a short book (it started as a paper!) called "Open MDMA: A Broad Narrative Review and Practical Guide for the Therapeutic use of MDMA." We want to democratize knowledge of safer and more effective MDMA-therapy, solo or assisted.
osf.io/preprints/ps...
OSF
osf.io
November 23, 2024 at 12:17 AM