Abstract
Psychedelic-assisted interventions are complex, context-sensitive interventions in which pharmacological, psychological, relational, environmental, cultural, and temporal processes interact. Trials of psilocybin and related compounds have reported promising but heterogeneous findings across psychiatric, substance-use, and existential indications, while also revealing challenges related to functional unmasking, expectancy, under-specified psychological support, incomplete reporting of extra-pharmacological variables, facilitator training, and altered-state suggestibility. Contemporary neuroscience suggests that classic psychedelics acutely perturb large-scale brain dynamics, alter functional connectivity, expand dynamical repertoire, and may transiently relax high-level predictive constraints. These effects may create windows of enhanced plasticity, learning, psychological flexibility, and context sensitivity, but neither destabilization nor plasticity is inherently therapeutic.
This article introduces ANCHOR, a complex-systems and mechanism-informed framework for psychedelic preparation, support, and integration. ANCHOR comprises six interdependent domains: Approach, Non-imposition, Context, Holism, Openness, and Relationality. It conceptualizes psychedelic support as therapeutic accompaniment: the deliberate shaping of safe, ethical, and participant-centred boundary conditions around a transiently destabilized brain-mind-body-relationship-environment system. Building on transition-state modelling, ANCHOR contributes a framework for complex-systems care, temporal transition-state support, active non-imposition, bounded openness, grounded self-trust, and threshold-state accompaniment.
ANCHOR is not proposed as a stand-alone psychotherapy, certification standard, clinical indication, or empirically validated treatment. Its immediate contribution is educational, operational, and methodological, providing a process-based language for facilitator stance, observable competencies, fidelity assessment, and research reporting. Future research should evaluate feasibility, reliability, training effects, participant experience, safety, cultural adaptation, and associations with therapeutic alliance, integration quality, adverse events, and clinical or educational outcomes.
Keywords: psychedelics; psilocybin; complex systems; threshold states; transition state; set and setting; therapeutic alliance; integration; psychedelic-assisted therapy; facilitator competencies; ethics; ANCHOR