Loneliness Test

The UCLA-3 (Three-Item UCLA Loneliness Scale) is a 3-item self-report questionnaire that measures perceived loneliness in adults. It was built for large telephone surveys and is scored from 3 to 9 ^[1].

What does the UCLA-3 measure?

Loneliness is the subjective, distressing feeling that arises when perceived social relationships fall short of desired ones. It is distinct from objective social isolation — a person can be surrounded by people and feel profoundly lonely, or live alone and feel deeply connected.

The UCLA Loneliness Scale, developed by researchers at UCLA and revised multiple times, is one of the most widely used measures of loneliness in adults. The 3-item version (UCLA-3) captures the core construct in under a minute and is validated for population surveys and clinical screening ^[1]. The full 20-item Version 3 is used widely in research and provides more granular measurement ^[2].

Loneliness matters for health as well as mood. A 2015 meta-analysis found that loneliness was associated with a 26% increased likelihood of mortality (OR = 1.26), a magnitude comparable to well-established risk factors ^[3].

A later commentary noted that comparing loneliness with cigarette smoking helped raise awareness, but oversimplifies the evidence and can put too much weight on treating individuals rather than on the structures and environments that shape relationships ^[5].

How do you give the UCLA-3?

How often do you feel the following? Respond based on how you have felt in the past few weeks.

Each item is rated: 1 = Hardly ever, 2 = Some of the time, 3 = Often

1. How often do you feel that you lack companionship?
2. How often do you feel left out?
3. How often do you feel isolated from others?

Total score ranges from 3 to 9. These are the three items of the short scale, drawn from the UCLA Loneliness Scale item pool ^[1].

How do you score and interpret the UCLA-3?

Totals run from 3 to 9: 3–5 below threshold and 6–9 likely lonely. The scorer at the top of this page shows each range with its note.

A score of 6 or above is a commonly used convention in population survey research to flag likely loneliness. It is not a clinical diagnostic criterion. Scores should always be interpreted alongside clinical context.

Psychometric properties

The 3-item scale, with a simplified set of response categories, was developed specifically for telephone surveys; its authors reported that it appears to measure overall loneliness quite well ^[1]. In their data, loneliness was related to objective measures of social isolation, but only modestly, supporting the view that perceived loneliness and objective isolation are distinct.

The full 20-item Version 3

The full 20-item UCLA Loneliness Scale Version 3 is the standard research scale. It consists of 20 items rated on a 4-point scale (1 = never to 4 = often), yielding a total score of 20–80.

• Reliability. Internal consistency is high (alpha 0.89–0.94 across samples) and one-year test-retest reliability is r = 0.73 ^[2].
• Structure. A global loneliness factor fits the data, plus two method factors reflecting item-wording direction ^[2].

The 20-item version is not typically used as a population screener because of its length, but it is appropriate for clinical outcome tracking and research. The 3-item version correlates strongly with the full scale and captures the same underlying construct.

Limitations

• Screening, not diagnosis. Loneliness is not a DSM or ICD diagnosis, and the ≥6 threshold is a survey convention, not a clinical cutoff.
• Self-report. Scores depend on the respondent's willingness to acknowledge loneliness, which some people find stigmatizing.
• Coarse range. With three items and a 3–9 range, the UCLA-3 offers less precision for tracking small changes than the full 20-item scale.
• No subtypes. It measures overall loneliness and does not separate social from emotional loneliness.

What types of loneliness are there?

Researchers distinguish several forms of loneliness that can co-occur or present independently:

Social loneliness refers to the absence of a broader social network — acquaintances, colleagues, group memberships, or a sense of community belonging. People experiencing social loneliness feel like outsiders or lack a satisfying circle of friends, even when an intimate relationship is present.

Emotional loneliness arises from the absence of a close, intimate attachment figure — a partner, a trusted confidant, or a deeply connected relationship. This form is associated with feelings of emptiness, abandonment, or being fundamentally misunderstood. It can persist even in socially active individuals.

Existential loneliness is a broader sense of fundamental aloneness in existence — the feeling that one's inner life is ultimately not fully shareable. This form is recognized in philosophical and psychotherapeutic traditions and is distinct from the social and emotional forms that most clinical measures capture.

Situational and chronic loneliness represent a temporal dimension. Situational loneliness is transient and tied to life circumstances (bereavement, relocation, relationship breakdown). Chronic loneliness persists over months or years, becomes self-reinforcing, and carries the most significant health consequences.

The UCLA scale and its short versions primarily measure the overall subjective experience of loneliness without distinguishing between social and emotional subtypes. Measures such as the de Jong Gierveld Loneliness Scale provide separate social and emotional subscales for research or clinical settings where the distinction matters.

How does chronic loneliness affect health?

Chronic loneliness has documented effects across multiple biological and psychological systems.

Mortality risk. A 2015 meta-analysis found that loneliness (OR = 1.26), social isolation (OR = 1.29) and living alone (OR = 1.32) were each associated with increased risk of early mortality, with effects comparable in magnitude to well-established risk factors ^[3].

An earlier meta-analysis of 148 studies (308,849 participants) found a 50% increased likelihood of survival for participants with stronger social relationships, consistent across age, sex, initial health status and cause of death ^[6].

Cardiovascular disease. A 2022 American Heart Association scientific statement found the most consistent evidence for an association between social isolation, loneliness, and coronary heart disease and stroke mortality. Its authors noted that the effect estimates are small and that few studies have tested the pathways involved ^[7].

Immune and endocrine dysregulation. Loneliness is associated with elevated interleukin-6 (IL-6) — a pro-inflammatory cytokine — above and beyond the effects of social isolation, while living alone is associated with flattened diurnal cortisol slopes, a marker of HPA axis dysregulation ^[4]. These distinct biological signatures suggest that subjective loneliness and objective isolation operate through separate physiological pathways.

Mental health. Loneliness often sits alongside depression and anxiety: in one trial, treating loneliness with internet-based CBT also lowered symptoms of depression and generalized anxiety ^[8]. It can also overlap with social anxiety disorder, where avoidance of social contact maintains the loneliness. Screening for depression alongside loneliness helps tell the two apart.

Cognitive decline. Some studies link loneliness with cognitive decline and dementia, but the AHA statement judged these data sparse and less robust than the evidence for heart disease and stroke ^[7].

What helps with loneliness?

A growing evidence base supports several intervention approaches, though effect sizes are generally modest and treatment response varies considerably by individual and context.

Cognitive Behavioural Therapy (CBT). CBT adapted for loneliness targets the maladaptive thoughts (e.g., "I am fundamentally unlikeable") and behavioural patterns (e.g., avoidance, negative social attribution) that maintain chronic loneliness.

In a randomized trial with 170 participants, internet-based CBT (ICBT) reduced UCLA Loneliness Scale scores more than both a wait-list (Cohen's d = 0.71) and internet-based interpersonal psychotherapy (d = 0.53). Gains were maintained at four-month follow-up, and ICBT also lowered depression and generalized anxiety symptoms ^[8].

Social skills and social-contact interventions. Structured programmes that increase the quantity and quality of social interactions show benefits, particularly when they address both the behavioural and cognitive components of loneliness. Group-based activities are effective for social loneliness, especially in older adults, though they address social loneliness more reliably than emotional loneliness.

Social prescribing. Link workers in primary care connect individuals to community-based activities, peer support, and voluntary organizations. Social prescribing is increasingly integrated into healthcare systems and has demonstrated feasibility for addressing loneliness, particularly when combined with motivational support to help individuals engage. The evidence base is still developing, with most trials assessing feasibility rather than efficacy.

Mindfulness and acceptance-based approaches. These aim to reduce the distress associated with loneliness without necessarily eliminating the feeling, and may be particularly suitable for existential loneliness or for individuals with limited social opportunity.

Digital and peer-support interventions. Telephone and video-based check-in programmes, online peer communities, and structured online group activities have demonstrated acceptability and some efficacy for loneliness reduction. These are especially relevant for housebound, rural, and highly stigmatized populations.