The Subjective Effect Index (SEI) is a collection of wiki articles designed to serve as a comprehensive reference work for the diverse range of subjective effects that can occur during an altered or non-ordinary state of consciousness. It has primarily been written to describe the effects of psychoactive substances (particularly hallucinogens) but may also be extended to other areas of psychonautics such as meditation, sensory deprivation, and lucid dreaming.
Each SEI entry consists of 1) a systematic effect name 2) a phenomenological description and analysis of the effect and 3) any other relevant information. SEI articles must adhere to a formalized writing style that avoids reliance on flowery metaphors or analogies, preferring instead to use ordinary language. This decision has been adopted in the hope that these descriptions will eventually come to serve as a universal terminology set that enables individuals to better analyze and share experiences that are otherwise difficult to describe.
The SEI currently contains over 200 entries that are organized into categories based on which sense they affect and their general behavior. Many of these effects are further broken down into leveling systems, subcomponents, and style variations that are reported to occur across different substances, doses, and situations. Detailed replications, in the form of image and video examples, have been included wherever possible to supplement the text descriptions.
The contents of this index are based on the collective experiences of our contributors along with various anecdotal reports collected from the internet and the scientific literature. A curated archive of some of these reports can be found in our experience index.