IPAS | Institutional Reference Edition
D
Depth Distortion Event — Perception that a hallway, stairwell, or room extends farther or contracts shorter than its physical dimensions. (Associations: Spatial anomaly; architectural influence; liminal geometry.)
Disembodied Vocalization — Voice‑like sound without a visible speaker, often brief, partial, or directionally ambiguous. (Associations: Auditory anomaly; presence cue; multi‑witness potential.)
Displacement Artifact Event — Object found relocated, rotated, or positioned in a way inconsistent with prior placement. (Associations: Object anomaly; environmental interaction; documentation recommended.)
Divergent Temperature Column — Vertical or pillar‑like temperature shift within an otherwise stable environment. (Associations: Temperature anomaly; structural resonance; corridor or cellblock pattern.)
Doorway Threshold Effect — Heightened presence sensation, auditory cues, or visual flicker occurring specifically at doorframes. (Associations: Threshold event; liminal architecture; transitional space sensitivity.)
Double‑Impression Phenomenon — Witness perceives two overlapping sensory impressions (e.g., two footsteps, two shadows) without corresponding physical sources. (Associations: Multi‑sensory anomaly; perceptual layering; rare.)
E
Echoic Residue Event — Faint repetition of a sound (voice, knock, shuffle) that does not match the acoustics or timing of the original. (Associations: Auditory anomaly; environmental repetition; archival sites.)
Electromagnetic Interference Burst — Sudden, localized disruption of devices, sensors, or communication equipment. (Associations: EM anomaly; mechanical irregularity; high‑complexity potential.)
Environmental Stillness Zone — Area where airflow, ambient noise, and environmental movement abruptly cease. (Associations: Environmental anomaly; presence cue; pre‑event indicator.)
Entity Proximity Impression — Strong, localized sense of a figure standing near the witness without visual confirmation. (Associations: Presence phenomenon; somatic cue; corridor or cellblock alignment.)
Ephemeral Light Drift — Soft, slow‑moving illumination that appears to “float” or drift across a space. (Associations: Visual anomaly; low‑intensity manifestation; often peripheral.)
Experiential Time Slip — Brief perception that time has slowed, accelerated, or momentarily “dropped out.” (Associations: Temporal distortion; cognitive anomaly; rare multi‑witness alignment.)
F
Flicker‑Phase Visual Event — Rapid, intermittent visual distortion resembling a flicker, static, or frame‑drop in the environment. (Associations: Visual anomaly; environmental interaction; EM correlation possible.)
Footfall Mimicry — Sounds resembling footsteps that match the witness’s pace or respond to movement. (Associations: Auditory anomaly; responsive pattern; corridor‑linked.)
Form Interruption Phenomenon — Brief perception of a figure partially obscured, incomplete, or “cut off” at the edges of vision. (Associations: Visual anomaly; peripheral perception; apparition precursor.)
Frequency Modulation Shift — Sudden change in ambient pitch, hum, or tonal vibration without mechanical cause. (Associations: Auditory anomaly; EM fluctuation; mechanical mimicry.)
Full‑Room Pressure Drop — Widespread sensation of atmospheric heaviness or compression affecting an entire room. (Associations: Somatic anomaly; environmental shift; pre‑event indicator.)
Fugitive Shadow Drift — Slow, gliding shadow movement not tied to any physical object or light source. (Associations: Shadow phenomenon; low‑visibility manifestation; liminal spaces.)
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