Symbols & Meaning
The emotions in dreams: mostly negative, and more accurate than the plots
Across every large collection of dream reports, unpleasant feeling outweighs pleasant by roughly two to one. The emotion is also the most stable element — and the part worth paying attention to.
Ask people to describe a dream and they describe events. Ask a researcher what the dream contained and they will tell you about the emotion, because that is what codes most reliably and predicts most.
The distribution
Content analysis using the Hall–Van de Castle system and its successors finds a consistent imbalance. Negative emotions outnumber positive ones by roughly two to one across large collections of home dream reports.
The most frequently coded emotions are, in rough order: anxiety or fear, which dominates; confusion; anger; sadness; and, some way behind, happiness.
The same asymmetry appears in the event content. Misfortune outnumbers good fortune. Aggressive social interactions outnumber friendly ones. Failure outnumbers success.
This is not what a wish-fulfilment theory predicts, and it is one of the more durable problems for Freud.
Threat simulation — dreaming rehearses danger because rehearsing danger had survival value.
Emotional processing — REM preferentially handles emotionally charged material, and charged material is disproportionately negative.
Neurochemistry — the amygdala and limbic regions are highly active during REM while the prefrontal regions that regulate and contextualise emotion are not.
Reporting bias — distressing dreams wake you and are remembered, while pleasant ones are slept through.
The neurochemical picture
REM sleep has a distinctive profile that fits the emotional character of dreams rather neatly.
Limbic and paralimbic regions — amygdala, anterior cingulate, medial prefrontal cortex — are strongly activated, in some imaging studies more so than during wakefulness. The dorsolateral prefrontal cortex, responsible for executive control, reasoning and emotion regulation, is deactivated.
And noradrenaline, the neurotransmitter of arousal and stress, falls to its lowest concentration of the entire twenty-four-hour cycle.
That last point is the basis of the emotion-regulation account. Matthew Walker's proposal is that REM offers a unique window: emotionally charged memories can be reactivated and reprocessed in the absence of the stress chemistry that would accompany recalling them awake. The memory is retained; the physiological charge attached to it is reduced.
Supporting evidence includes reduced amygdala reactivity to emotional images after a night containing REM, compared with sleep deprivation. And in post-traumatic stress disorder, where REM is disturbed, this overnight reduction fails to occur — the memory stays charged and keeps recurring.
The mismatch between emotion and content
A curious and consistent observation: dream emotion frequently does not fit the events.
People report terror during entirely mundane scenes, or complete equanimity during events that would be horrifying awake. The uncritical acceptance of absurdity is one of the most characteristic features of dreaming — a dead relative appears and the dreamer is unsurprised; the house has a room that does not exist and this seems normal.
This dissociation is consistent with the neurological picture. Emotion generation is running hot and the systems that would evaluate whether the emotion fits the situation are offline.
It also suggests something about interpretation. If the emotion is generated somewhat independently of the narrative, then the narrative may be partly a confabulated explanation for the feeling rather than its cause — the cortex constructing a story that would account for the affect it is experiencing.
What follows for reading your own dreams
The practical implication is that the emotion is the more informative element, and the plot is the less reliable one.
Three dreams — being chased through a building, arriving unprepared for an examination, and missing a train — have entirely different content and may be carrying an identical feeling. Tracking the emotion across dreams reveals patterns that tracking the imagery does not.
Ernest Hartmann's contemporary theory of dreaming made this central. He argued that the dream image is best understood as a picture of the dominant emotion — that dreams are guided by emotional concern and that the imagery is metaphor for feeling rather than symbol for content.
His best-known evidence came from studying dreams after trauma. Following major events, dreamers frequently reported a recurring central image — a tidal wave, a fire, being engulfed — that did not depict the trauma itself but appeared to depict the feeling of it. He documented this pattern in survivors of a range of different traumas, with the same wave imagery recurring across events that had nothing in common except the emotion.
A modest suggestion for a dream journal
Record the emotion first and separately, before the narrative. It is more stable, it decays more slowly than the imagery, and over months it produces a record of what has actually been weighing on you — which is a more defensible use of dreams than trying to decode what the staircase meant.
