History repeating: guidelines to address common problems in psychedelic science

Area of Science:

• Neuroscience
• Psychiatry
• Clinical Psychology

Background:

• Recent years have seen a surge in optimism regarding the therapeutic applications of psychedelics for mental health disorders.
• This optimism is evidenced by increased research, investment, media attention, and policy shifts.
• However, significant challenges threaten the scientific rigor and reliability of current psychedelic research.

Purpose of the Study:

• To identify and categorize the most pressing challenges in psychedelic science.
• To analyze how these challenges impact the internal, external, construct, and statistical conclusion validity of study findings.
• To provide a framework and tools for improving the quality of psychedelic research.

Main Methods:

• Categorization of 10 key challenges into easy, moderate, and hard problems.
• Analysis of how these challenges affect different aspects of research validity.
• Development of a roadmap and checklist for stakeholders to assess research quality.

Main Results:

• Identified challenges threaten the validity of core findings in psychedelic studies.
• These issues can confound treatment effects, limit generalizability, obscure mechanisms of action, and lead to flawed conclusions.
• Challenges often co-occur, compounding their negative impact on assessing psychedelic therapy's safety and efficacy.

Conclusions:

• Current psychedelic research faces substantial validity threats that undermine conclusions about clinical efficacy and safety.
• A systematic approach is needed to address these methodological and conceptual issues.
• Implementing the proposed roadmap and checklist is essential for advancing reliable psychedelic science and avoiding past research pitfalls.