Loneliness

Loneliness is the distance between the connection a person has and the connection they want. That definition has held since the 1970s, and the most useful thing about it is what it leaves out, which is any number of people.

The short version, and the one that decides whether a reader recognises themselves in the word: loneliness is not having nobody around. It is having nobody who knows what you are currently going through.

Which is why the sharpest version of it tends to happen in company. In a relationship where the conversation has narrowed to logistics and is not going badly. In an office where somebody says your name every morning and nothing else about your life is on record there. In a group chat that has not stopped in two years and has not carried a true sentence in one.

Alone is a fact about a room: how many people, how many hours. Loneliness is a fact about a gap. The test of whether two words describe the same thing is whether they ever come apart, and these come apart in both directions.

Zero solitude, high loneliness is the case the headcount model cannot see at all. A parent of a small child who is not by themselves for a single minute of the day. A nurse at the end of a ward shift. Somebody sharing a flat with three people and eating in their bedroom to avoid the kitchen.

Long stretches alone, no loneliness is the reverse, and it gets pathologised more often. Time by yourself has its own measured effects, and they are not the mild end of a scale that ends in loneliness. Nguyen, Ryan and Deci found solitude lowered high-arousal feeling in both directions at once, the pleasant and the unpleasant, and produced relaxation and lower stress specifically when people had chosen it. Choice is what separates solitude from loneliness, not duration.

There is a third reading that gets mistaken for both: tiredness after company, which is the social battery and answers to a quiet weekend. Loneliness does not. The distinction is worked out properly in the difference between lonely and alone.

Loneliness has at least three readings underneath it, and only one of them is easy to count.

• Contact. How much company there was. The only layer with a number attached, and therefore the one everybody checks.
• Being known. Whether anyone currently holds the live version of your life. The shortfall looks like this: nobody could say what the last month has actually been like, and nobody would notice a month of silence.
• Belonging. Whether there is anywhere you fit without translating yourself first. Present at things and part of none of them.

Robert Weiss split the experience in two in 1973, into social loneliness, meaning the absence of a network or a place, and emotional loneliness, meaning the absence of one person who knows what is happening. Russell and colleagues tested that typology in 1984 on a large student sample and found the two separable in their causes and in how they feel, with a shared core of distress underneath. Student samples, so the generalisation is not free. The three-layer reading is the same idea with belonging pulled out of the social half.

The layers do not substitute for one another. Somebody with a crowded network and nobody who knows anything is not half supplied; they are full on one layer and empty on another. This is why "but I have friends" settles nothing. It is a statement about contact. The loneliness check scores the three separately for that reason, and the informative result is usually the mismatch rather than the total.

Transient and chronic loneliness are treated in the literature as different objects, and the difference is not only severity. A bad fortnight after a move usually corrects itself, because nothing has changed about how the following fortnight gets read. Something that has been running for most of a year has had time to change the reading.

Sustained loneliness biases how social information gets processed. Spithoven, Bijttebier and Goossens reviewed the evidence and found a negative bias at every stage in lonely people: what gets attended to, what intent gets attributed, what gets expected, what gets remembered afterwards. The bias was specific to social material rather than a general gloom, which is the detail that makes it a mechanism rather than a mood.

The everyday form is an unanswered message, which is an unanswered message to one person and information about their own worth to another. What follows is self-protection: expecting coolness, a person sends less, discloses less, accepts less, leaves earlier. The hedging is read accurately as distance and returned in kind, which supplies the next piece of evidence. The loop closes without anyone in it behaving badly.

And the property that makes it a trap rather than a habit: the exit runs through initiative, and the state itself is what takes initiative away. Reaching out costs more in month six than in month one, and it is the same reach either way.

The evidence chain for all of this, including the longitudinal work on which way the arrow runs between loneliness and low mood, is walked through in the difference between lonely and alone. What the gap actually responds to has a counterintuitive answer and belongs to its own article. This entry stops at the definition on purpose.

Not social isolation. Isolation is countable from outside: network size, contact frequency, who lives with whom. Loneliness is the subjective reading, and the two agree far less often than the words suggest. Studies measuring both usually find each one predicts outcomes the other does not.

Not introversion, and not a drained social battery. Those are about how much company somebody wants and what it costs them. Loneliness is about a shortfall against whatever that preference is.

Not depression, although the overlap is substantial enough that the two are routinely mistaken for one another, and the longitudinal evidence suggests loneliness more often comes first.

Not a diagnosis. It appears in no diagnostic manual and there is no condition on the other side of feeling it.

Not rare, and not a verdict on being likeable. Barreto and colleagues surveyed more than forty-six thousand people across 237 countries and found loneliness highest among the youngest adults and in the most individualistic societies, which are not the ages or the places with the least contact available.

The situational pattern says the same thing more concretely. Moving city, a break-up, bereavement, a first baby, retirement, shift work, a remote job. What those have in common is not that the people inside them are deficient. Each of them removes contact that used to happen without anybody arranging it, and the arranging is the hard part.

If loneliness has arrived with low mood that has stayed, or with thoughts of not wanting to be here, that is not a thing to interpret. Talk to someone today: a doctor, an emergency service, or a crisis line in your country.