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.
Thank you Emergence Benefactors!
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
Thursday, April 22 2021 · 7 min read
Inspired by the Shulgin Rating Scale, this article attempts to model the overall dissociative experience as a systematic progression of six levels.
Featured Replications
Artistic representations of specific subjective effects
A replication of Drifting
by StingrayZ
Featured Reports
Recommended firsthand accounts of hallucinogenic experiences
by Kaytwo
Combination
by nervewing
MXE
50mg Intranasal
Ayahuasca
2g Syrian Rue / 1g Mimosa Hostillis Oral
by Kaytwo
DMT
50mg Smoked
by Anonymous
4-HO-MET
60mg Oral
by nervewing
Memantine
150 mg Oral
by nervewing
4-HO-MET
30 mg Oral in Gel Cap
by Gregasaurus
LSD
4 tabs Oral
