A Spectrum of Selves Reinforced in Multilevel Coherence: A Contextual Behavioural Response to the Challenges of Psychedelic-Assisted Therapy Development
This paper presents a newly optimised Contextual Behavioural Science (CBS)/Acceptance and Commitment Therapy (ACT) model — the Spectrum of Selves — that adapts psychological flexibility processes to the unique challenges of psychedelic-assisted therapy by integrating varied self-models, biological mechanisms and evolutionary principles. It offers a practical, theory-driven framework (with intervention examples, a case study and an integration checklist) to align guided experiences with target behaviours and maintenance strategies, aiming to broaden treatment benefits and reduce relapse.
Abstract
Psychedelic-assisted therapy research for depression and PTSD has been fast tracked in the United States with the Food and Drugs Administration (FDA) granting breakthrough designations for MDMA (post-traumatic stress disorder) and psilocybin (major depressive disorder). The psychotherapeutic treatments accompanying these psychedelics have not been well-studied and remain controversial. This article reviews the challenges unique to psychedelic-assisted therapy and introduces a newly optimised psychological flexibility model that adapts Contextual Behavioural Science (CBS)/Acceptance and Commitment Therapy (ACT) to those multiple challenges, including ego inflation, traumatic memories, and the perceived presence of entities . A methodology aligned with biological mechanisms, psychological processes and therapeutic contexts may be advantageous for improving outcomes. This model expands ACT by integrating practices and data from psychedelic-assisted therapy research into a Contextual Behavioural Science framework, allowing both fields to inform each other. Psychological flexibility processes are questioned and adapted to a psychedelic context, and interventions that operationalise these processes are considered. The principle through-line of the paper is to consider varied constructs of Self, as understood by these fields, and integrates respective elements of varied self-models, interventions and data into a Spectrum of Selves model for psychedelic-assisted therapy. Secondly the paper examines how to select and retain new self-perspectives and their corresponding behaviours systemically, drawing from evolutionary science principles. A case example of such behavioural reinforcement is provided, as well as a psychedelic integration checklist to guide the practical implementation of such an approach. This method can enable a coherent therapeutic framework with clear operational relationships between (1) problematic behaviour patterns that an individual wishes to address (2) the guided psychedelic experiences of that individual, and (3) the barriers to maintaining any changes, thus increasing theoretical-practical coherence, broadening treatment benefits and reducing relapse in psychedelic-assisted therapy. Research questions for further developing a CBS-consistent psychedelic-assisted therapy are offered.
Research Summary of 'A Spectrum of Selves Reinforced in Multilevel Coherence: A Contextual Behavioural Response to the Challenges of Psychedelic-Assisted Therapy Development'
Introduction
Psychedelic-assisted therapy combines a psychedelic compound with a therapeutic context and is usually organised into three phases: psychotherapeutic preparation, a guided medication session with psychological support, and post‑session integration. Randomised controlled trials have reported large effects across conditions such as depression, PTSD, addiction and anxiety in life‑threatening illness, and investigators commonly emphasise that the psychotherapeutic component is critical for safety and for maximising long‑term gains. Despite rapid clinical progress and regulatory attention for compounds such as MDMA and psilocybin, integrated psychotherapeutic frameworks that are empirically and operationally aligned with psychedelic phenomena remain sparse and contested, particularly regarding what should happen during the medication session and how to prevent relapse after apparent clinical improvement. Kewalramani proposes to address that gap by adapting Contextual Behavioural Science (CBS) and Acceptance and Commitment Therapy (ACT) to the specific challenges of psychedelic‑assisted therapy. The paper presents a new, practice‑oriented model—the Spectrum of Selves (SoS)—that reconceptualises psychological flexibility as a multilevel, graded set of self‑perspectives tailored to common psychedelic phenomena (for example: trauma surfacing, multiplicity of parts, ego‑inflation, mystical unity, and encounters with entities). In addition to the conceptual model, the study offers practical tools: a multilevel reinforcement grid for integration, a case example, and a checklist to guide implementation, and it sets out empirical questions for future testing.
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Whitfield, H. J. (2021). A Spectrum of Selves Reinforced in Multilevel Coherence: A Contextual Behavioural Response to the Challenges of Psychedelic-Assisted Therapy Development. Frontiers in Psychiatry, 12. https://doi.org/10.3389/fpsyt.2021.727572
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