UCLA-3: Three-Item Loneliness Scale

What this assessment is

The UCLA-3 is a three-item questionnaire about subjective loneliness.

Its formal research name is the Three-Item Loneliness Scale. It was derived from the Revised UCLA Loneliness Scale for use in large surveys.

The measure asks about the frequency of three experiences: limited companionship, feeling left out, and feeling isolated. It produces a total from 3 to 9.

It measures perceived social disconnection. It does not diagnose a mental health condition.

Who it was designed for

The original study developed the short scale for population research involving middle-aged and older adults.

Later studies have evaluated it in younger adults and in several languages. A score should still be compared with evidence from a suitable population and version.

The standard questions do not specify a fixed recall period. Adaptations that add a timeframe are modified versions and may need their own evidence.

How it is administered

The three questions can be read aloud or completed as a self-report form.

Each response uses three frequency levels. Completion usually takes less than two minutes.

All three responses are needed for the standard total. The original paper does not provide a general rule for replacing a missing answer.

Keep the wording, response scale, language, and recall instructions consistent with the validated form.

What it measures

The UCLA-3 measures how often a person experiences three aspects of loneliness:

• lack of companionship
• exclusion from others
• isolation from others

Loneliness is subjective. A person can have frequent contact and still feel lonely. Another person can spend substantial time alone without feeling disconnected.

The MSPSS asks whether support feels available from family, friends, and a significant other. It measures perceived support, not loneliness itself.

How scoring works

Each response is scored from 1 to 3. Add the three responses.

The total ranges from 3 to 9. Higher totals indicate more frequent loneliness experiences.

There are no reverse-scored items. Do not shift the total to 0 to 6 unless the chosen study or reporting system explicitly uses that recoding.

Do not calculate a standard score from fewer than three valid responses unless a validated protocol provides a rule.

How to interpret a UCLA-3 score

The original scale treats the result as a continuous measure. It does not establish diagnostic severity bands.

A total of 3 is the minimum. A total of 9 is the maximum. Scores between them show increasing frequency across the three experiences, not a diagnosis or a fixed level of clinical need.

Some studies classify 6 or more as loneliness. Others use different boundaries. A recent comparison of the three-item and 20-item UCLA scales notes that many cutoffs have been used.

Name the selected rule and its source before categorizing a result. Do not present one research threshold as universal.

What the score cannot tell you

The UCLA-3 cannot show why someone feels lonely or how large their social network is.

It cannot distinguish a temporary response to bereavement, illness, relocation, or conflict from a persistent pattern.

It also cannot diagnose depression, social anxiety, cognitive impairment, or another condition. These can overlap with loneliness, but they require separate assessment.

A low total does not prove that relationships are supportive or safe. A high total does not show which response would help.

Evidence and limitations

The original research found that the three-item total correlated strongly with the longer loneliness scale and showed useful reliability for a very brief measure.

A population validation study supported the 3-to-9 structure in a Spanish adult sample and also showed that average scores varied across demographic groups.

The short format is efficient but narrow. It cannot describe the quality, source, or history of a person's relationships.

Record the exact language, response coding, recall instructions, and any cutoff used with the result.