Cited by 4,782Health disparities and outcomesDeath Anxiety and Social ExclusionAttachment and Relationship Dynamics

Loneliness matters: a theoretical and empirical review of consequences and mechanisms

Open access
Hawkley, Louise C., Cacioppo, John T.·2010·Annals of Behavioral Medicine

Abstract

As a social species, humans rely on a safe, secure social surround to survive and thrive. Perceptions of social isolation, or loneliness, increase vigilance for threat and heighten feelings of vulnerability while also raising the desire to reconnect. Implicit hypervigilance for social threat alters psychological processes that influence physiological functioning, diminish sleep quality, and increase morbidity and mortality. The purpose of this paper is to review the features and consequences of loneliness within a comprehensive theoretical framework that informs interventions to reduce loneliness. We review physical and mental health consequences of loneliness, mechanisms for its effects, and effectiveness of extant interventions. Features of a loneliness regulatory loop are employed to explain cognitive, behavioral, and physiological consequences of loneliness and to discuss interventions to reduce loneliness. Loneliness is not simply being alone. Interventions to reduce loneliness and its health consequences may need to take into account its attentional, confirmatory, and memorial biases as well as its social and behavioral effects.

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Crossref · 10.1007/s12160-010-9210-8

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  • Lonely people may be particularly susceptible to disengaging from treatment early.

    “Given that loneliness is a significant and independent risk factor for complex psychopathology, including depression and suicidal ideation [8,9,11,12,34-36], lonely people may be particularly susceptible to disengaging from treatment early.”

    From The Effectiveness of a Smartphone Intervention Targeting Suicidal Ideation in Young Adults: Randomized Controlled Trial Examining the Influence of Loneliness (2023) · cites this paper as [34]

    The ‘Loneliness Matters for Mental Health and Cognitive Functioning’ section reports associations with psychoses and suicide and says loneliness predicts later increases in depressive symptoms. It does not specifically establish suicidal ideation or an independent risk for complex psychopathology as a whole. The statement about early treatment disengagement follows the citation and reads as the citing authors’ inference, not a finding attributed to this source. Page numbers were not available in our copy. (LLM, conf=0.78)

    Experimental — accuracy not yet measured
  • Loneliness is associated with more complex psychopathology, including depression and suicidal ideation.

    “These results are consistent with the existing literature examining the relationship between loneliness and mental health to the extent that they suggest that loneliness is associated with more complex psychopathology [8,9,11,12,34-36].”

    From The Effectiveness of a Smartphone Intervention Targeting Suicidal Ideation in Young Adults: Randomized Controlled Trial Examining the Influence of Loneliness (2023) · cites this paper as [34]

    The “Loneliness Matters for Mental Health and Cognitive Functioning” section associates loneliness with personality disorders, psychoses, suicide, and increased depressive symptoms, supporting the broader claim about complex psychopathology. It does not specifically mention suicidal ideation; suicide is a distinct outcome. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • Both social isolation and loneliness are related to negative health-related behaviors, such as reduced physical activity and smoking.

    “Moreover, both social isolation and loneliness have been shown to be related to negative health-related behaviors, such as reduced physical activity and smoking [24,27–29]”

    From Examining social isolation and loneliness in combination in relation to social support and psychological distress using Canadian Longitudinal Study of Aging (CLSA) data (2020) · cites this paper as [24]

    The Health behaviors section (page unavailable) reports that loneliness predicted reduced physical activity and discusses other health-compromising behaviors, including alcohol abuse. It does not link smoking to loneliness or establish that social isolation, separately from loneliness, is associated with reduced activity or smoking; its mention of social isolation concerns exercise's effects on neurogenesis in animals. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Loneliness is a powerful emotional state that urges consumers to seek social connections.

    “First, research in psychology indicates that loneliness is a powerful emotional state that urges consumers to seek social connections (Hawkley and Cacioppo 2010; Holt-Lunstad et al. 2015).”

    From AI Companions Reduce Loneliness (2024) · cites this paper as Hawkley and Cacioppo 2010

  • Up to 80% of young people typically report experiencing loneliness.

    “That feelings of isolation were elevated before school lockdowns (T2) might reflect normal trends, because up to 80% of young people typically report experiencing loneliness (Hawkley & Cacioppo, 2010), while one in ten report “often” feeling lonely (Snape & Manclossi, 2018).”

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Research works printed but not linked: 1

  1. [99]Emler N Goodman R Ben Ze’ev A Gossip, reputation, and adaptation Good Gossip Lawrence University of Kansas Press 1994 34 46

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Authors
Hawkley, L. C., & Cacioppo, J. T.
Affiliations
University of Chicago (US)
Corresponding author
Hawkley, Louise C.
Venue
Annals of Behavioral Medicine
Published
2010-07-22
Volume
40
Issue
2
Pages
218-227
ISSN
  • 0742-5554 (ISSN-L)
  • 0883-6612
  • 1532-4796
OpenAlex
W2168289525
Cited by
4,782
References
104
Citations by year
2026: 598 · 2025: 580 · 2024: 534 · 2023: 576 · 2022: 561 · 2021: 515 · 2020: 379 · 2019: 230 · 2018: 191 · 2017: 149 · 2016: 111 · 2015: 131 · 2014: 92 · 2013: 63 · 2012: 40
FWCI
7.30
Type
journal article
Language
en
Open access
Locations
  • Annals of Behavioral Medicine (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • John Templeton Foundation
  • National Institutes of Health (Z99 RG999999, 5r01ag036433-02)
  • National Institute on Aging (R01 AG 036433-01, R01-AG036433, R01AG034052)
Topics
  • Social Sciences › Health › Health disparities and outcomes
  • Social Sciences › Psychology › Social Psychology › Death Anxiety and Social Exclusion
  • Social Sciences › Psychology › Social Psychology › Attachment and Relationship Dynamics
Keywords
loneliness, social isolation, hypervigilance, social danger, vulnerability, sleep quality, physical health effects, mental health outcomes, attentional bias, memory bias, loneliness interventions, physiological function
MeSH terms
Cognition, Health Status, Humans, Hypothalamo-Hypophyseal System, Immune System, Loneliness, Mental Health, Mortality, Pituitary-Adrenal System, Gene Expression

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