Dr. Adam Levin, a psychiatrist and researcher, based at Ohio State University's Center for Psychedelic Drug Research and Education (CPDRE). Adam works at the intersection of psychedelics, psychiatry and neuroscience. In this conversation, we discuss Adam's recent paper, which proposes a new theory about how psychedelics work, focusing on the intriguing role of brain lateralisation in psychedelic experiences and therapeutic outcomes.

My guests today are Bruce Wampold and Pim Cuijpers, two of the leading experts in the research of the effectiveness of psychotherapy. Bruce is Emeritus Professor of Counseling Psychology at the University of Wisconsin–Madison and author of the seminal book, The Great Psychotherapy Debate: The Evidence for What Makes Psychotherapy Work. Pim is Professor Emeritus of Clinical Psychology at the Department of Clinical, Neuro and Developmental Psychology, Amsterdam Public Health research institute, Vrije Universiteit Amsterdam and is also director of the WHO Collaborating Centre for Research and Dissemination of Psychological Interventions.

In this conversation, we discuss the evidence for psychotherapy as a whole, the evidence for how the effectiveness of different psychotherapies compare, how to study the drivers of change in psychotherapy (such as the "therapeutic alliance") and discuss what the current evidence suggests as fruitful avenues for the future of psychotherapeutic research and practice.

My guest today is Dr Chris Letheby, a philosopher working on issues related psychedelic drugs who is currently a lecturer in philosophy at the University of Western Australia and a postdoctoral researcher at the University of Adelaide. Chris is also the author of the book Philosophy of Psychedelics, which was published in 2021 by Oxford University Press.

In this conversation we touch on the account given in Chris' book of the therapeutic benefits of psychedelics, and then go deep into Chris' account of the phenomenology of psychedelics. This conversation was a lot of fun, and I hope you enjoy it as much as I did.