IPAS | Institutional Reference Edition
G
Gait‑Pattern Residue — Repetitive footstep rhythm perceived in a space with no visible source, often matching historical movement patterns. (Associations: Auditory anomaly; environmental repetition; corridor or cellblock alignment.)
Geometric Distortion Field — Localized area where angles, lines, or spatial proportions appear subtly warped or misaligned. (Associations: Spatial anomaly; architectural influence; liminal geometry.)
Glide‑Form Apparition — Visual impression of a figure or shape moving smoothly without typical human gait mechanics. (Associations: Visual anomaly; apparition subtype; low‑sound manifestation.)
Gravitational Drift Sensation — Momentary feeling of being pulled, tilted, or shifted without physical movement. (Associations: Somatic anomaly; environmental shift; rare multi‑witness potential.)
Group Perceptual Synchrony — Multiple witnesses reporting the same sensory impression simultaneously without communication. (Associations: Perceptual convergence; reliability indicator; high‑complexity event.)
H
Hallway Compression Effect — Perception that a corridor narrows, shortens, or “presses inward” while the witness is inside it. (Associations: Spatial anomaly; architectural resonance; liminal space sensitivity.)
Harmonic Tone Event — Sustained or intermittent tonal sound resembling a hum, chord, or vibration with no mechanical source. (Associations: Auditory anomaly; EM correlation; environmental interaction.)
Heat‑Bloom Anomaly — Sudden, localized warmth appearing in an otherwise cool or stable environment. (Associations: Temperature anomaly; somatic cue; proximity impression.)
Human‑Form Shadow Projection — Shadow resembling a human outline without a corresponding physical object or light obstruction. (Associations: Shadow phenomenon; visual anomaly; peripheral perception.)
Hypnagogic Environmental Overlay — Brief, dream‑adjacent perceptual intrusion occurring during transitional states of consciousness in a charged environment. (Associations: Cognitive anomaly; liminal consciousness; interpretive drift.)
I
Imitative Sound Event — Environmental noise that mimics a recognizable sound (footsteps, voices, knocks) in a responsive or patterned manner. (Associations: Auditory anomaly; mimicry; responsive pattern.)
Incoherent Vocal Burst — Fragmented, partial, or unintelligible vocalization perceived without a visible speaker. (Associations: Auditory anomaly; presence cue; low‑duration event.)
Intermittent Shadow Break — Shadow movement appearing in brief, staccato intervals rather than continuous motion. (Associations: Visual anomaly; shadow subtype; liminal architecture.)
Internal Pressure Shift — Sudden sensation of ear pressure, chest compression, or bodily heaviness without environmental cause. (Associations: Somatic anomaly; atmospheric irregularity; pre‑event indicator.)
Isolated Cold Draft — Narrow, directional airflow felt in a space with no vents, openings, or temperature gradients. (Associations: Temperature anomaly; airflow irregularity; threshold or corner‑linked.)
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