How Are Dreams Similar to Waking Life?

Dreams vs reality#

More often than not, our dreams appear random, bizarre, and irrelevant to our waking life. Sometimes, you may notice themes that relate to current or past situations in your life. Even if not literal or obvious, our dreams tend to have connections and metaphors regarding content from our waking lives. Images and faces we may not even notice in the background, save in our subconscious minds and seep into the dream space.^[1] The regurgitations and memory consolidations from our life appear as content for our dreams.

Many people experience nightmares after a traumatic event, especially if it's unresolved. That link has been documented directly: a field study of Palestinian children living through conflict found their dream content shifted to match what they were living through, with far more threatening events than in children from a peaceful area.^[2]

This idea has a name in dream research: the continuity hypothesis. Dreams reflect waking concerns, thoughts and experiences. And it holds up in an unusually tidy way.

The continuity hypothesis, tested#

The cleanest demonstration is almost comically direct. Researchers measured how much time people actually spent on activities during the day, then counted how often those activities appeared in their dreams. The proportion matched. Sport students dreamed about sport more than psychology students did, in rough proportion to how much sport they played.^[3,4] The same has been shown for musicians, whose waking musical activity predicts how much music turns up in their dreams.^[5]

There's one interesting exception. Reading is a striking one: people read far more than they play sport, yet dream about reading far less. So it isn't a simple stopwatch. Activities that are physical, social and emotionally engaged make it into dreams more readily than quiet, internal ones.

But dreams don't replay your day#

Here's the correction that most articles on this topic skip, and it matters if you're trying to interpret your own dreams.

Over 14 days, 29 people logged their daily activities and their dreams, then matched one against the other. Around 65% of dream reports contained some element of recent waking life. But the episodic replay of an actual event, an experience recurring as a whole with its people, place and plot intact, appeared in no more than 1-2% of dreams.^[6]

So your brain is not filing footage. It's taking fragments (a face, a feeling, a room) and recombining them into something that never happened. Which is exactly why your dreams feel simultaneously familiar and nothing like your life. If you're waiting for a dream to obviously depict your day, you'll wait a long time. The connection is real, it just runs through pieces rather than scenes.

Yesterday, and also last Tuesday#

Waking events don't arrive in dreams on a single schedule. Incorporation peaks twice: on the one or two nights right after an event, the day-residue effect, and then again five to seven nights later, the dream-lag effect.

A 38-person diary study sharpened this. The delayed peak showed up specifically for personally significant events, not for ordinary daily activities and not for ongoing worries.^[7] Something that mattered to you emotionally goes away and comes back a week later.

That's a practical tip for anyone keeping a dream journal: when a dream feels connected to something but you can't place it, check what happened about a week ago, not just yesterday.

Scientists have concluded that dreams have a significant connection with our waking life activities such as decision-making, personality, stressful events etc., and they somehow influence our way of dealing with things.^[8]

Our own personal interpretation of our dreams also has an effect on our psyche. The imagery of dreams is not a mysterious language that can only be decoded by an expert, but rather a metaphorical or direct representation of what concerns us emotionally in our waking life. Studies suggest that it is the intensity of emotions that are more likely to appear in dreams.^[9] Intense and emotional waking life experiences, whether positive or negative, are activated during sleep and incorporated into dreams via imaginative processes such as metaphor generation and the association of disparate memories.

Precognitive Dreams#

It is quite common to experience a moment in life exactly as you had previously dreamt it. It may be a random insignificant moment or a serious event. Some research suggests up to a third of people report some type of precognitive experience, often in the form of a dream that seemed to come true. Precognitive dreams, in simple terms, are any dreams that give you information about the future you wouldn’t otherwise have. Most of us know what it feels like to experience uncanny feelings of premonition, a flash of insight into the future that seems to have no rational explanation. We often dismiss these feelings as luck or a creepy coincidence, but what you may not know is that there is compelling scientific evidence that backs up the accuracy of at least some of these precognitive experiences.

Many report that because of their dream they felt prepared and controlled their fear. President Abraham Lincoln dreamt of his death about a week before he died. He was apparently quite interested in the meaning of dreams and what they have to say about future events both positive and negative. This has left scientists perplexed about the true significance of dream content. In 1966, 150 people were killed when waste from a coal mine buried a school in South Wales. Many who had died, as well as other locals, had mentioned dreams and premonitions of dying in the days before. Dreams certainly show us our past, and present lives. What about dreams that predict the future; could they be real? Scientific research offers several more likely explanations, but experts still don’t fully understand the potential of dreams.