The inner life
Oneirology
Direct answer
Oneirology is the scientific study of dreams: how and when they arise in sleep, what they contain, and what, if anything, they are for.
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At a glance
- Also called
- science of dreams, study of dreams, dream science, oneirologist
- Found in
- Consciousness & Spiritual Psychology
- Related
- REM Sleep, Continuity Hypothesis, Oneiromancy, Dream Interpretation
Oneirology is the scientific study of dreams: how and when they arise in sleep, what they contain, and what, if anything, they are for.
A plain educational schematic; it does not diagnose a condition or replace professional care.
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What is oneirology?
Oneirology takes its name from the Greek oneiros, dream. It is the study of dreaming by observation and measurement: waking sleepers in the laboratory and asking what was in their minds, recording brain activity, and counting what large samples of dream reports contain.
Oneirology asks different questions from dream interpretation. An interpreter asks what one dream means for one person. An oneirologist asks which sleep stages produce dreams, why they are forgotten, how they relate to waking life, and whether dreaming serves memory, emotion or nothing at all. The field has findings and no agreed theory.
On the tree of the hidden arts: Dreams.
What sets Oneirology apart
Its method is the mark of the field: the dream report, collected under known conditions. A dream cannot be observed, only told afterwards, so everything rests on when the sleeper was woken and how the account was taken down. Two tools made it a science, the sleep recording that shows which stage a report came from, and the coding system that turns thousands of reports into numbers. Its odd position is to have solid data and several rival theories of function.
- Word: Greek oneiros, dream, and logia, study
- Founding finding: REM sleep, Aserinsky and Kleitman, 1953
- Coding system: Hall and Van de Castle, The Content Analysis of Dreams, 1966
- Early statistics: Mary Whiton Calkins, 1893
- Main rival theories: activation-synthesis, threat simulation, continuity, memory consolidation
Often mistaken for something else: Oneiromancy asks what a dream foretells; oneirology asks how dreaming works and makes no forecasts.
The story behind Oneirology
Alfred Maury's Le sommeil et les rêves of 1861 and Mary Whiton Calkins's Statistics of Dreams of 1893 were early attempts to study dreams systematically. The modern field dates from 1953, when Eugene Aserinsky and Nathaniel Kleitman reported rapid eye movement sleep, and from the content analysis that Calvin Hall and Robert Van de Castle published in 1966. Lucid dreaming was verified in the laboratory in the 1970s and 1980s.
Why Oneirology matters
Oneirology supplies the tested facts about dreaming against which any theory of meaning, old or new, has to be held.
How to read Oneirology
Writers use the word to mark the scientific side of dream study off from interpretation and from divination by dreams.
Oneirology in practice: an example
A volunteer sleeps wired to a recorder, is woken in each REM period, and dictates what was passing through her mind.
Where readings of Oneirology go wrong
The science describes dreaming in general; it has little to say about what a particular dream means to its dreamer.
Sources and editorial method
This entry summarizes the tradition in the Almanac's own words; where no source is listed, it is an editorial summary rather than a primary text, and symbolic readings are named as the tradition's, not as fact.
- Source
- The Great Almanac Dictionary
- Category
- Consciousness & Spiritual Psychology
- Aliases
- oneirology meaning, science of dreams, study of dreams, dream science, oneirologist
- Last updated
- 2026-09-26
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Common questions
What is oneirology?
The scientific study of dreams. It covers when dreaming happens in sleep, what dreams contain, how they are remembered, and what function they might serve.
What has oneirology found out about dreams?
That vivid dreaming is most frequent in REM sleep but also occurs outside it, that most dreams are forgotten, and that dream content largely reflects the dreamer's waking concerns. The purpose of dreaming is still disputed.
