UCLA Three-Item Loneliness Test

What you are about to take

The UCLA Three-Item Loneliness Scale is a 3-question screener developed by Mary Elizabeth Hughes, Linda Waite, Louise Hawkley, and John Cacioppo at the University of Chicago in 2004. It was designed for population surveys that needed something shorter than the 20-item UCLA scale (Russell 1980) but with similar validity. The 3 items load onto a single factor and produce a total score between 3 and 9. About 30 seconds. No signup. Your answers stay in your browser — we never see them. Start the test below ↓

✓ Validated by Hughes, Waite, Hawkley, Cacioppo (2004, Research on Aging) ✓ Used by ELSA, HRS, and the U.S. Surgeon General’s Advisory (2023) ✓ 30 seconds, 3 questions ✓ Private — answers never leave your device ✓ Public domain — free to use

How the score is calculated

You answer three questions: how often you feel that you lack companionship, how often you feel left out, how often you feel isolated from others. Each is rated 1 (hardly ever), 2 (some of the time), or 3 (often). The three numbers sum to a total between 3 and 9.

The cutoff is 6. Hughes 2004 set it after comparing the 3-item version against the full 20-item UCLA scale; sensitivity and specificity were both around 75% at this threshold. Steptoe 2013 used the same cutoff in the English Longitudinal Study of Ageing (ELSA) and linked it to roughly a 26% higher all-cause mortality risk over an 8-year follow-up.

What loneliness is — and isn’t

Loneliness is the feeling that your social connections fall short of what you want them to be. It is not a personal failing. The U.S. Surgeon General’s 2023 Advisory framed it as a public-health issue affecting all ages — about half of U.S. adults report meaningful loneliness in any given year, and young adults (18–25) often score highest, not the very old.

A few things the UCLA-3 deliberately captures and a few it doesn’t:

What it captures: the subjective sense of missing connection, isolation, and being left out. The frequency component (often vs sometimes vs hardly ever) matters more than any single intense moment.

What it doesn’t capture: the specific kind of loneliness (missing a partner vs missing peers vs missing a community), whether loneliness is recent or chronic, whether it co-occurs with depression or anxiety, and whether social contact you do have feels safe and reciprocal.

When this test is useful — and when it isn’t

Useful for:

• A 30-second self-check when something feels off socially but you can’t name it
• Tracking change across months if your situation is shifting (move, retirement, breakup, illness, new parenthood)
• Bringing a number to a doctor’s visit if you’ve noticed sleep, mood, or appetite changes alongside the social feeling

Not useful for:

• Diagnosing depression — loneliness and depression frequently co-occur but are distinct (Cacioppo 2010, Psychology and Aging). Take the PHQ-9 separately
• Replacing a clinician conversation if loneliness has lasted more than 3 months
• Children or teens — the scale was validated on adults; younger ages need different tools

Loneliness vs solitude vs introversion — what each means

A lot of confusion lives in these three words.

Solitude is time spent alone. It can be chosen and restorative (a quiet morning, a long walk, a solo retreat) or imposed and depleting (being stuck home sick). The UCLA-3 says nothing about whether your solitude feels good or bad.

Introversion is a personality trait — where you draw energy from. Introverts often prefer smaller, deeper social circles to large gatherings. Many introverts score low on UCLA-3 because their small inner circle meets their needs.

Loneliness is the perception that your social connection is not what you want it to be. Extraverts can score high on UCLA-3 if they want more connection than they have. Introverts can score high if their inner-circle relationships have thinned out. The scale measures the gap between what you want and what you have, regardless of personality type.

Health risk and what the numbers mean

Loneliness in the 6–9 band has measurable physical-health effects, not just emotional ones. Holt-Lunstad 2015 (Perspectives on Psychological Science) pooled 70 studies and 3.4 million participants and found that loneliness raises the risk of all-cause mortality by approximately 26%, comparable in magnitude to smoking 15 cigarettes a day, drinking 6 alcoholic units a day, or obesity. The mechanism appears to involve chronic low-grade inflammation, elevated cortisol, and reduced cardiovascular recovery (Hawkley 2010).

This is not a guilt-trip statistic. Loneliness is treatable, and the same meta-analyses show that structured group interventions and CBT for Loneliness move scores meaningfully within 8 to 12 weeks (Masi 2011; Käll 2020). The number matters because it justifies treating loneliness as a clinical signal worth acting on, not as a character flaw to push through.

If you are in crisis tonight

If loneliness feels overwhelming and you are having thoughts of self-harm or suicide, the U.S. Suicide and Crisis Lifeline is at 988 (call or text — handles loneliness and emotional distress, not only suicide, and operates 24/7). The U.K. Samaritans line is 116 123. Crisis lines are appropriate for loneliness — you do not need to be in immediate danger to call.

Related tests

• PHQ-9 depression screener — loneliness and depression frequently co-occur (Cacioppo 2010)
• GAD-7 anxiety screener — social anxiety amplifies loneliness for some people
• PSS-10 perceived stress scale — chronic loneliness raises perceived stress and vice versa

Sources verified 2026-05-17

• Hughes ME, Waite LJ, Hawkley LC, Cacioppo JT. A short scale for measuring loneliness in large surveys: results from two population-based studies. Research on Aging 2004;26(6):655-672. (PMID 18504506)
• Steptoe A, Shankar A, Demakakos P, Wardle J. Social isolation, loneliness, and all-cause mortality in older men and women. PNAS 2013;110(15):5797-5801. (PMID 23530191)
• Holt-Lunstad J, Smith TB, Baker M, Harris T, Stephenson D. Loneliness and social isolation as risk factors for mortality: a meta-analytic review. Perspectives on Psychological Science 2015;10(2):227-237. (PMID 25910392)
• Murthy VH. Our Epidemic of Loneliness and Isolation: The U.S. Surgeon General’s Advisory on the Healing Effects of Social Connection and Community. 2023.
• National Institute on Aging (NIH). Social isolation and loneliness in older adults. nia.nih.gov.
• CDC. How right now — Coping with loneliness. cdc.gov/howrightnow.

Privacy

The UCLA-3 calculation runs entirely in your browser. Your individual answers and the calculated band never leave your device. We send one anonymous event to a privacy-respecting analytics service: your locale code and the band string (for example lonely_6_9). No raw answers, no per-item data, no identifier of any kind.