The Original Model
Leary’s third circuit included the hand as well as the voice. Language, manual skill, tool use, calculation, categorization, technical knowledge, and conceptual systems were all part of symbolic activity. His progression moved from receiving and imitating cultural symbols, toward organizing them, and then participating in larger systems of communication and creation. The stages were laryngeal-manual symbolic receptivity, intelligence, and fusion-synergy. (Leary, 1977)
This made the circuit central to his account of reality construction. A person learns more than names for an independently understood world: available symbols help determine what they can notice, describe, compare, and communicate. Leary extended that observation into strong claims about neurological imprinting. The contemporary lens concentrates on how interpretations form, especially when an experience arrives before the person has words for it.
Contemporary Translation
A session may contain imagery, autobiographical material, emotion, bodily sensation, apparent memory, unusual perception, or an insight that initially seems impossible to express. Language begins organizing this material almost immediately. A person who has learned to expect trauma release may understand shaking differently from someone expecting divine communication, ego death, or an effect of predictive processing. Terms such as serotonin and neuroplasticity carry scientific associations; energy, chakras, ancestral memory, shadow work, inner healer, and nervous system release belong to different explanatory traditions. Their familiarity or usefulness does not give them equal evidentiary standing. (McGovern et al., 2022) (Dupuis, 2021)
The practitioner contributes vocabulary before the session starts. Preparation can broaden understanding, but it can also teach someone what they are expected to encounter. A detailed account of inevitable buried trauma or a promised spiritual breakthrough may become an interpretive template. Scientific language can be equally suggestive when a hypothesis is presented as a settled description of that participant’s brain. Explaining uncertainty is part of accurate education, especially when the participant is relying on professional authority to distinguish evidence from metaphor. (Szigeti & Heifets, 2024) (Caporuscio & Fink, 2024)
Expectancy and suggestion are related but distinguishable. Expectations concern what a person anticipates; suggestions introduce possible sensations, meanings, or responses. In a placebo controlled study of ten healthy volunteers, Carhart-Harris and colleagues found higher ratings on a suggestibility measure under LSD, while a separate cued imagery measure did not show the same significant effect. The finding supports a bounded claim about that study and task. It does not establish that every psychedelic makes every person uniformly hypersuggestible, or that participants lose all agency over interpretation. (Carhart-Harris et al., 2015)
Keep three kinds of account distinct
Participant report
What the person says they experienced.
Observation
What the practitioner saw or heard directly.
Interpretation
What either person thinks the experience means.
A reading aid drawn from this chapter’s practice discussion.
Memory, recognition, and documentation
Vivid autobiographical material deserves careful listening. A participant may experience an image as a memory and feel an immediate, powerful recognition of its truth. Vividness and conviction are features of the experience, however, and neither independently establishes that an event occurred as pictured. Memory involves reconstruction, and psychedelic experiences do not provide a validated method for recovering historically accurate memories. The literature on false insight connects this problem with broader work on memory, familiarity, and belief formation, while acknowledging how much remains to be tested directly under psychedelics. (McGovern et al., 2024)
A practitioner can invite description without supplying a story. Ask what the person experienced, what they already knew before the session, what remains uncertain, and what support they need now. Avoid questions that presume an event, an offender, a motive, or a hidden meaning. A participant’s distress can be addressed while the historical explanation remains open. Corroboration, when appropriate, is a separate process and should not be manufactured through repeated suggestion.
Documentation needs the same precision. “Participant reported communicating with her deceased mother” records phenomenology. “Participant communicated with her deceased mother” asserts an external event. The distinction also applies to emerging memories, apparent entities, ancestral encounters, and another person’s inferred intentions. Separate the participant’s words, observable behavior, relevant prior information, and the practitioner’s assessment. Later readers should be able to tell how each claim entered the record.
Noetic certainty and false insight
Some ideas arrive with a feeling of being self evidently true. This noetic quality may be emotionally persuasive even when the idea has not been examined outside the session. McGovern and colleagues propose a theory of how altered processing could contribute to false insights and beliefs; it is a theoretical account, not a demonstration that a particular participant’s insight is false. Borkel and colleagues similarly identify a need for empirical work on how psychedelics may change the criteria people use to justify beliefs. Both help frame questions that a competent practitioner should be able to hold open. (McGovern et al., 2024) (Borkel et al., 2025)
An interpretation can contain several claims with different status. “I felt loved,” “I can be kinder to myself,” and “a supernatural being has instructed me to stop treatment” do not require the same kind of evaluation. The first describes an experience, the second may express a workable intention, and the third combines a metaphysical explanation with a consequential instruction. Respectful inquiry can separate them without stripping the experience of meaning. The practitioner’s role includes helping the participant preserve room for revision and consultation. (Caporuscio & Fink, 2024)
In Practice
A participant encounters a deceased parent and asks whether the parent was literally present. The practitioner can acknowledge the closeness and emotional significance of the encounter, ask what it brought up, and be candid about not being able to establish its external cause. Neither affirming literal contact nor dismissing the encounter as meaningless is required to support grief and reflection.
Another participant experiences what feels like a recovered childhood memory. The practitioner listens without completing the story, documenting it as newly reported experience with its source and uncertainty intact. Before a confrontation or accusation, the person may need time, independent support, and careful consideration of what is known. The session itself is not corroboration.
A participant concludes that their depression came from a specific neurotransmitter problem that the session has now corrected. They want to stop prescribed medication. The practitioner explores the improvement they have noticed while distinguishing it from an unverified biomedical explanation. Decisions about medication return to the prescribing clinician, with appropriate communication and the participant’s consent.
A person feels that a childhood humiliation explains every later difficulty, but parts of the narrative remain uncertain. The practical insight may be that self criticism has become harsh and automatic. That observation can support a small change, such as noticing critical self talk or practicing a different response, without requiring a final theory about the origin of the whole personality. Subsequent experience may refine the explanation.
Evidence Boundary
Suggestion, expectancy, memory reconstruction, cognitive framing, and belief formation are legitimate psychological domains. Psychedelic studies and reviews suggest that some of these processes can change under particular conditions. The evidence varies across substances, measures, and populations, and theoretical papers do not establish incidence or individual prediction. Strong certainty is not a truth test; neither is the fact that an insight occurred under a psychedelic a reason to reject it automatically. (McGovern et al., 2022) (Carhart-Harris et al., 2015) (Borkel et al., 2025)