Imagery, suggestion, and source monitoring

Phenomenological Control

Phenomenological control is the capacity to have experiences that fit an expectation, imaginative suggestion, or perceived task demand, sometimes while the experience feels involuntary (Lush et al., 2020; Lush et al., 2021; Dienes and Lush, 2023). That does not make the experience fake. It also does not make expectation the master explanation for every vision, voice, bodily change, spiritual presence, psychedelic scene, tulpa, or VR hallucination. The harder question is which part of a report comes from imagery, which from suggestion, which from stimulus structure, which from source monitoring, and which from practice or culture (Dijkstra et al., 2022; Luhrmann et al., 2021; Suzuki, 2026). This page helps separate expectation-shaped experience from fakery, pathology, spirituality, hallucination, and stimulus-driven effects.

Investigation map

Separate variables before synthesis

Start with a refusal. Imagery strength, phenomenological control, source monitoring, absorption, porosity, hypnotizability, psychedelic response, and ritual meaning are not interchangeable names for one hidden faculty. They can overlap in real people and real settings, but each one needs its own evidence route (Kay et al., 2022; Lush et al., 2020; Luhrmann et al., 2021).

That separation makes the topic more useful. Imagery research can be checked against pupillometry, binocular rivalry, lesion cases, prevalence estimates, drawing, neuroimaging, and single-neuron work (Keogh and Pearson, 2018; Keogh et al., 2020; Wadia et al., 2026). Phenomenological control can be checked against response to imaginative suggestion and expectancy-sensitive experiments. Source monitoring can be checked against reality-monitoring and subjective-signal-strength work (Lush et al., 2021; Dijkstra and Fleming, 2023). Porosity and absorption can be checked against cross-cultural and ethnographic work on spiritual presence. Induced-vision systems can be checked against stimulus parameters and reported phenomenology (Lifshitz et al., 2019; Hewitt et al., 2025).

The synthesis comes after the separation. Vivid imagers, hypnotic responders, mystics, psychedelic users, tulpamancers, and VR participants should not be treated as the same kind of person. The better question is how particular combinations of person, practice, stimulus, setting, and interpretation move experience (Studerus et al., 2012; Luhrmann et al., 2023; Suzuki et al., 2017).

Start here

Use this page when you need to separate expectation, imagery, source monitoring, stimulus effects, and cultural framing without reducing experience to fakery.

Variables kept apart

  • Imagery vividness, location, modality, and controllability
  • Phenomenological control and response to imaginative suggestion
  • Source monitoring and reality judgment
  • Absorption as immersive attentional style
  • Porosity as a culturally taught model of mind-world permeability
  • Stimulus conditions: ganzfeld, ganzflicker, stroboscopic light, VR, and DeepDream-like systems
  • Meaning-making frames: prayer, ritual, technopaganism, cyberdelics, and therapeutic context

Claims held back

  • A single proven visionary type remains unestablished.
  • Expectation does not mean fakery.
  • Induced vision remains narrower than full psychedelic experience.
  • Digital or ritual settings need direct evidence before clinical claims.
  • Transhistorical shaman-prophet-artist-scientist bridges need stronger historical sources.

Field guide

Why the separation matters

A useful account can say which evidence carries which part of a claim. Galton anchors the older history of imagery variation. Keogh, Kay, and Wadia anchor the measurement and neural-reuse side. Lush anchors phenomenological control. Slater and Ehrsson keep expectancy-only accounts from getting too large. Luhrmann anchors porosity and spiritual presence. Hewitt and Amaya anchor induced visual phenomena. Suzuki's DeepDream frame separates classifier, generator, and discriminator roles. Dijkstra and Fleming anchor reality monitoring. Studerus keeps psychedelic response tied to dose, person, and setting. Hartogsohn and Dos Santos anchor the cyberdelic and digital-spiritual context (Galton, 1880; Slater and Ehrsson, 2022; Hartogsohn, 2023; Dos Santos, 2023).

This keeps the tone clear. Calling an experience expectation-shaped is not the same as calling it fake. Calling an experience perceptual is not the same as granting it a single source or meaning. Report, physiology, attention, practice, stimulus design, and cultural framing are interacting constraints, and the source of an experience may be mixed (Lush et al., 2023; Dijkstra et al., 2022).

Current focus

  • Imagery variation, aphantasia, hyperphantasia, and objective imagery markers
  • Phenomenological control, expectation, hypnotic suggestibility, and measurement context
  • Source monitoring, reality judgment, and subjective signal strength
  • Absorption, porosity, prayer practice, and spiritual-presence reports
  • Ganzfeld, ganzflicker, stroboscopic light, VR, and DeepDream as induced-vision comparators
  • Ritual, cyberdelics, digital spirituality, and the social life of altered-experience claims

Related pages

  • Prophantasia for projected imagery, self-testing, and citizen-science infrastructure
  • Deep Dream for hallucination simulation and cyberdelic systems
  • Tulpas for trained inner others, imposition, and discernment boundaries
  • Fractal Optics for flicker, structured light, and induced-vision comparators
  • Brain Candy for non-pharmacological state-shift design
  • SANE for broader social, narrative, and meaning-making questions

Current state

As of May 22, 2026

The imagery side of the field is moving quickly. The strongest recent shift is not a new self-report scale but a tighter bridge between imagery and object perception. Wadia and colleagues' 2026 Science paper reports single-neuron evidence that imagined and perceived objects can use a shared code in human ventral temporal cortex. That supports a bounded shared-code claim. It does not make imagery identical to seeing, and it does not settle hallucination, spirituality, or phenomenological control (Wadia et al., 2026).

The DeepDream side has also become more precise. Suzuki's 2026 paper proposes a C x G x D frame: classifier feature exposure, generative constraint, and discriminator or reality-monitoring thresholds. That is useful here because it keeps three questions apart. What content becomes available? What prior or image model shapes it? When is internally generated content treated as real? Phenomenological control belongs near the expectancy and suggestion side of that ecology. It does not own the whole explanation (Suzuki, 2026; Gershman, 2019).

The same current literature also pushes against easy measurement triumphalism. Vanbuckhave and colleagues' 2026 pupillometry study replicates group-level brightness-related pupil effects while warning that individual variability and weak vividness correlations make the protocol unready as a standardized aphantasia measure. Schwarzkopf and colleagues' 2026 work argues that vividness ratings still capture a broad range of internally generated visual experience, including "seeing" with eyes shut and externally projected imagery, while also sharpening the need to distinguish faint or unseen pictorial representation from complete absence (Vanbuckhave et al., 2026; Schwarzkopf et al., 2026).

On the hypnosis side, Varga and colleagues' 2025 abstract-level record is a useful boundary warning: trait imagery outside hypnosis did not correlate meaningfully with hypnotizability in that sample, while imagery during hypnosis did. State, context, and task framing are therefore central, instead of turning imagery vividness into a universal predictor (Varga et al., 2025).

Recent anchors

  • Wadia et al. 2026: a final Science DOI supports the shared-code claim (Wadia et al., 2026).
  • Suzuki 2026: the C x G x D frame sharpens the DeepDream bridge without turning it into validation (Suzuki, 2026).
  • Dijkstra et al. 2022 and Dijkstra and Fleming 2023: source monitoring and subjective signal strength stay separate from imagery vividness (Dijkstra et al., 2022; Dijkstra and Fleming, 2023).
  • Vanbuckhave et al. 2026: pupillometry remains promising but not a clean individual diagnostic shortcut (Vanbuckhave et al., 2026).
  • Schwarzkopf et al. 2026: vividness connects to varied internally generated visual experiences, including projected imagery reports (Schwarzkopf et al., 2026).
  • Varga et al. 2025: hypnotizability relates more cleanly to imagery during hypnosis than to trait imagery outside hypnosis, in the available abstract-level record (Varga et al., 2025).
  • Hewitt et al. 2025 and Amaya et al. 2025: stroboscopic light is now better framed as a serious but bounded induced-vision paradigm (Hewitt et al., 2025; Amaya et al., 2025).

Current constraint

The evidence supports a richer public story than "it is all suggestion" or "it is all perception." It cannot support a single mechanism, a single trait, or a clinical promise.

Synthesis

Changing experience without flattening it

Experience is shapeable, but it is not infinitely plastic. The hard question is at the boundary between expectation, imagery, stimulus, source judgment, and culture.

Phenomenological control is a construct, not a master key

The term is useful because it names a real methodological problem. People can generate experiences in response to imaginative suggestion, expectation, and perceived task demands, and some of those experiences can feel involuntary. Lush and colleagues make that problem visible in mirror-sensory and rubber-hand contexts, while the Phenomenological Control Scale extends the construct beyond explicitly hypnotic framing (Lush et al., 2020; Lush et al., 2021; Lush et al., 2023).

Source monitoring adds a nearby but different problem. A person may generate an image, sensation, or felt presence and still need to judge where it came from. Dijkstra's reality-monitoring work belongs there. This is why vividness, expectation, absorption, and reality judgment need separate columns (Dijkstra et al., 2022; Dijkstra and Fleming, 2023).

The limit matters just as much. Slater and Ehrsson's reanalysis of rubber-hand data argues that synchronous multisensory stimulation remains the dominant driver even when hypnotisability and expectations are considered. That is the right model for the whole topic: phenomenological control can shape experience, but it does not erase stimulus structure, body-based evidence, or task-specific mechanisms (Slater and Ehrsson, 2022).

Imagery is measurable, divided, and historically old

The imagery line begins with a conservative claim. People differ in mental imagery, and that difference predates the modern labels aphantasia and hyperphantasia. Galton's nineteenth-century survey already recorded sharp variation and mutual disbelief between vivid and weak imagers. Contemporary work adds better handles: binocular-rivalry priming, pupillary response, cortical excitability, lesion cases, prevalence estimates, drawing and memory profiles, and now single-neuron evidence that imagery and perception can partially reuse object codes (Galton, 1880; Keogh and Pearson, 2018; Kay et al., 2022; Thorudottir et al., 2020; Wadia et al., 2026).

Those findings do not collapse the field into one vividness ladder. A person can have pictorial imagery without seeing it as if with the eyes. Another can report externally projected imagery, visual noise, hypnagogic effects, or presence without fitting cleanly into aphantasia or hyperphantasia. Location, vividness, modality, control, voluntariness, and context all need to be kept separate long enough to be measured (Wright et al., 2024; Schwarzkopf et al., 2026; Azanon et al., 2025).

Porosity is social as well as personal

The cultural evidence does not say that belief simply invents perception. It says that communities teach people how to attend to inner life, how to interpret bodily or imaginal events, and how porous the boundary between mind and world is allowed to feel. Luhrmann's work on prayer and spiritual presence shows that absorption and porosity can both matter, but they matter differently: one is closer to immersive attentional style, the other to culturally taught mind-world boundaries (Luhrmann et al., 2010; Luhrmann and Morgain, 2012; Luhrmann et al., 2021).

That makes control distributed. A report may be shaped by a person, teacher, ritual, interface, stimulus, room, dose, group, and story. Prayer and tulpamancy are useful comparison lanes here because both involve practice, attention, and discernment, but neither should be reduced to phenomenological control. A prepared frame can meet a real sensory perturbation, and the resulting experience can be sincere, trained, and constrained at the same time (Luhrmann et al., 2023; Mikles and Laycock, 2015).

Expectation is not a synonym for fakery

Expectation is often used too crudely. In one register it becomes a debunking weapon: the participant expected something, therefore the report is not real. In another register it becomes a magic explanation: set the frame correctly and anything can happen. The evidence supports neither move. It supports the narrower claim that expectation, suggestion, and task demand can help generate real reported experience, and that the route into the report is part of the phenomenon (Lush et al., 2023; Dienes and Lush, 2023).

Varga's 2025 hypnosis-imagery result is useful here because it points away from trait simplification. General imagery vividness outside hypnosis did not do the work in that abstract-level record; state imagery during hypnosis did. That pattern fits the broader pattern: context, instruction, attention, and engagement can matter as much as stable trait labels (Varga et al., 2025).

Engineered vision is the laboratory edge

Ganzfeld, ganzflicker, stroboscopic light, recursive imagery, DeepDream, and VR hallucination designs make the question experimentally concrete. They show that visual phenomenology can be perturbed under describable conditions. Timing, luminance, color, field structure, rhythmicity, imagery ability, safety screening, and expectation all matter. This is why the induced-vision line is valuable: the stimulus can be specified (Wackermann et al., 2008; Konigsmark et al., 2021; Hewitt et al., 2025; Amaya et al., 2025).

The limit is equally important. Flicker, ganzfeld, VR, and DeepDream-like systems do not prove spiritual perception, universal trainability, clinical efficacy, or psychedelic equivalence. They are tools for asking sharper questions about how sensory input, expectation, attention, imagery, and meaning meet. Suzuki's newer C x G x D proposal strengthens that rule by separating feature exposure, generative constraint, and discriminator thresholds. The related Deep Dream page follows this same rule: partial visual overlap is not the same as a full altered-state model (Suzuki et al., 2017; Suzuki, 2026).

Psychedelics and VR need their own evidence lane

Psychedelic response is partly shaped by dose, person, and setting, but that does not turn psychedelics into hypnosis or phenomenological control. The same caution applies to psychedelic-inspired VR. Open-label feasibility work and group VR studies show that immersive systems can alter selected experiences and measures, but they should not be described as therapeutic efficacy by analogy alone (Studerus et al., 2012; Kaup et al., 2023; Glowacki et al., 2022). Sensory dimensions of psychedelic experience deserve attention, but the sensory lane is only one part of the altered-state picture (Aqil and Roseman, 2023).

Meaning-making remains the open historical question

The evidence can already say that imagery, absorption, expectation, perceptual perturbation, hypnosis, and psychedelic response are shaped by both person and context. It can also say, with historical caution, that magic, religion, and practical knowledge do not form a simple ladder where one replaces the other. They can coexist, interlace, and address different kinds of uncertainty (Malinowski, 1948; Tambiah, 1990).

What remains open is the stronger role question: whether societies repeatedly selected or cultivated people whose experience more readily moved toward presence, vision, bodily response, or conviction. That question belongs in the comparison, but it should stay marked as a hypothesis until the historical record is stronger. Late-modern media-mysticism sources help with a narrower history of cybernetics, psychedelia, occulture, and digital spirituality, not with an uninterrupted ancient lineage (Davis, 2019; Hartogsohn, 2023; Dos Santos, 2023).

Evidence audit

Current evidence state

Solid

Partial

  • Wadia 2026 improves the shared-code imagery/perception bridge, but it supports bounded synthesis rather than broad mechanism claims (Wadia et al., 2026).
  • Suzuki 2026 and the Dijkstra reality-monitoring work sharpen the source-monitoring boundary, but they do not turn phenomenological control into a master mechanism (Suzuki, 2026; Dijkstra et al., 2022).
  • Varga 2025 is useful for separating trait imagery from state imagery, but the available record is still abstract-level (Varga et al., 2025).
  • Cyberdelic and technopagan sources support contemporary framing and practice ecology, not clinical equivalence (Hartogsohn, 2023; Dos Santos, 2023).
  • Davis and media-history materials support a late-modern genealogy, not an uninterrupted ancient lineage (Davis, 2019).

Speculative

  • One stable visionary type across religious, artistic, scientific, psychedelic, and immersive-media settings remains a hypothesis, not a result.
  • Cross-domain source-monitoring comparisons are promising, but prayer, tulpamancy, psychosis, hypnosis, psychedelics, and induced vision need separate methods (Luhrmann et al., 2023).
  • Clinical-facing VR and cyberdelic systems should stay at the status, feasibility, or selected-measure level unless outcome studies support stronger claims (Kaup et al., 2023).

Open

  • Whether one stable perceptual-cognitive profile recurs across shamans, prophets, healers, artists, and scientists.
  • Whether individual case studies can responsibly support paradigm-shift claims.
  • How divine-minds typologies should refine the culture and context story (McNamara, 2023).
  • How far the history can go beyond late-modern media mysticism without stronger historical sources (Tambiah, 1990; Davis, 2019).

References

Sources and entry points

These references are grouped by role. Current web records and living pages were checked on May 22, 2026 unless a source has a fixed publication record.

Imagery and measurement

Control, hypnosis, and embodiment

Source monitoring and computational models

Absorption, porosity, and spiritual presence

Induced vision and cyberdelics

History and embodied meaning

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