Effect Index
Effect Index, is a resource dedicated to establishing the field of formalised subjective effect documentation. It is the home of the Subjective Effect Index (SEI), which contains 233 effect descriptions that exist to serve as a comprehensive map of all potential experiences that can occur under the influence of any class of psychoactive compound, particularly hallucinogens.
The effects identified here are accompanied by detailed descriptions of how it feels to experience them. These are written in an objective and consistent writing style based upon phenomenological observation and avoids the use of metaphor or analogy. The descriptions also strive to use language that is as simple and understandable as possible. This has been done with the hope that they will serve as a universal terminology that allows people to describe and discuss that which was previously considered ineffable.
These effects are organised into categories based on the sense affected and their behaviour. Many of these are further broken down into levels, subcomponents, and variations in style, which can occur across different substances. Detailed replications are included whenever possible to supplement the text descriptions in the form of images, audio clips, and animations.
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Substance Summaries
Hallucinogenic substance classes, broken down and described
- Psychedelics: Visual, Cognitive, Miscellaneous
- Dissociatives
- Deliriants
Featured Effects
A selection of subjective effects that best represent the SEI
Visual Effects
Autonomous entityColour shiftingDriftingEnvironmental patterningExternal hallucinationGeometryInternal hallucinationSymmetrical texture repetitionTracersVisual disconnection
Featured Article
Analyses that go beyond individual subjective effects
Saturday, May 8 2021 · 23 min read
Inspired by the Shulgin Rating Scale, this article attempts to model the overall DMT experience as a systematic progression of stages and levels.
Featured Replications
Artistic representations of specific subjective effects
A replication of Geometry
by StingrayZ
Featured Reports
Recommended firsthand accounts of hallucinogenic experiences
by Anonymous
2C-E
25mg Oral
by Oscarette
Combination
My First Experience with Unity
by Anonymous
Ayahuasca
2.5g Syrian Rue / 6g Mimosa hostilis rootbark Oral
My fourth experience with unity
by Anonymous
4-HO-MET
100mg Oral
My Second Experience with Unity
by Anonymous
Ayahuasca
2.5g Syrian Rue / 6g Mimosa hostillis Oral
by Sedric Lightbury
DPH
2000mg Oral
by nervewing
MXPr
60mg Intranasal
by Kaytwo
Combination
