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The placebo effect as a personality driven phenomenon

Examining the Psychological and Neurobiological Mechanisms Through Which Placebo and Nocebo Effects Influence Personality Traits and Dynamics

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  • Shalom Omondi polygence

DOI:

https://doi.org/10.58445/rars.2945

Abstract

The placebo and nocebo effect have been considered a curious clinical phenomenon in research. It explores how medicine and other drugs work both physically and emotionally by using a counterfeit in order to tell the effects of the drug in question. In recent years scientists have tried exploring the different concepts that make it work and are unique. But despite the successes of its mechanisms, the implications of its effects are still unclear. In past years scientists have investigated methods to personalize it.This paper goes over the influence that placebo has on different personality traits in relation to the Big Five personalities. This paper synthesizes evidence to argue that specific Big Five personality traits—notably lower neuroticism and higher agreeableness and openness—act as significant modulators of placebo responsiveness. By examining psychometric, clinical, and neuroimaging research, we posit that these inherent individual differences offer a crucial, yet underutilized, pathway for personalizing therapeutic strategies and enhancing treatment efficacy. In terms of neuroticism studies, further reveal that placebo responders exhibit activity in brain regions that are associated with cognitive control. Such findings suggest that personality traits are modulated and established in neural circuits. Clinically understanding suggests that by incorporating the psychometric view clinicians will be better equipped to enhance therapeutic responsiveness and harness placebo mechanisms in practice. Ultimately, the whole process identifies the benefits of factoring in placebos as a way to personalize and improve treatment.

References

Colagiuri, Ben, et al. “The Placebo Effect: From Concepts to Genes.” Neuroscience, vol. 307, 29 Oct. 2015, pp. 171–190, www.ncbi.nlm.nih.gov/pmc/articles/PMC5367890/, https://doi.org/10.1016/j.neuroscience.2015.08.017.

Colloca, Luana, and Franklin G. Miller. “The Nocebo Effect and Its Relevance for Clinical Practice.” Psychosomatic Medicine, vol. 73, no. 7, Sept. 2011, pp. 598–603, www.ncbi.nlm.nih.gov/pmc/articles/PMC3167012/ https://doi.org/10.1097/psy.0b013e3182294a50 .

Czerniak, Efrat, and Michael Davidson. “Placebo, a Historical Perspective.” European Neuropsychopharmacology: The Journal of the European College of Neuropsychopharmacology, vol. 22, no. 11, 1 Nov. 2012, pp. 770–774, https://www.ncbi.nlm.nih.gov/pubmed/22608298,

https://doi.org/10.1016/j.euroneuro.2012.04.003 Accessed 24 Feb. 2020.

Darragh, Margot, et al. “Investigating the “Placebo Personality” Outside the Pain Paradigm.” Journal of Psychosomatic Research, vol. 76, no. 5, May 2014, pp. 414–421, https://doi.org/10.1016/j.jpsychores.2014.02.011 . Accessed 12 May 2021.

Diederich, N. J., and C. G. Goetz. “The Placebo Treatments in Neurosciences: New Insights from Clinical and Neuroimaging Studies.” Neurology, vol. 71, no. 9, 25 Aug. 2008, pp. 677–684, https://doi.org/10.1212/01.wnl.0000324635.49971.3d.

Enck, Paul, et al. “The Placebo Response in Medicine: Minimize, Maximize or Personalize?” Nature Reviews Drug Discovery, vol. 12, no. 3, 1 Mar. 2013, pp. 191–204, www.nature.com/articles/nrd3923.pdf, https://doi.org/10.1038/nrd3923.

Feldhaus, Mari Hanna, et al. “Association of Nocebo Hyperalgesia and Basic Somatosensory Characteristics in a Large Cohort.” Scientific Reports, vol. 11, no. 1, 12 Jan. 2021, https://doi.org/10.1038/s41598-020-80386-y. Accessed 1 Feb. 2022.

Grünbaum, Adolf. “The Placebo Concept.” Behaviour Research and Therapy, vol. 19, no. 2, 1981, pp. 157–167, https://doi.org/10.1016/0005-7967(81)90040-1.

Horing, Bjoern, et al. “Prediction of Placebo Responses: A Systematic Review of the Literature.” Frontiers in Psychology, vol. 5, 1 Oct. 2014, https://doi.org/10.3389/fpsyg.2014.01079.

Kern, Alexandra, et al. “The Influence of Personality Traits on the Placebo/Nocebo Response: A Systematic Review.” Journal of Psychosomatic Research, vol. 128, 1 Jan. 2020, p. 109866, www.sciencedirect.com/science/article/abs/pii/S0022399919301990, https://doi.org/10.1016/j.jpsychores.2019.109866.

Munnangi, Swapna, et al. “Placebo Effect.” Nih.gov, StatPearls Publishing, 13 Nov. 2023, https://www.ncbi.nlm.nih.gov/books/NBK513296/.

Oken, B. S. “Placebo Effects: Clinical Aspects and Neurobiology.” Brain, vol. 131, no. 11, 21 June 2008, pp. 2812–2823, https://doi.org/10.1093/brain/awn116.

Papakostas, George I. “Correlation between Different Levels of Placebo Response Rate and Clinical Trial Outcome in Major Depressive Disorder: A Meta-Analysis.” Psychiatrist.com, The Journal of Clinical Psychiatry, 15 Oct. 2012, https://www.psychiatrist.com/jcp/correlation-between-different-levels-placebo-response/ #. Accessed 11 June 2025.

Rutherford, Bret R., and Steven P. Roose. “A Model of Placebo Response in Antidepressant Clinical Trials.” American Journal of Psychiatry, vol. 170, no. 7, July 2013, pp. 723–733, www.ncbi.nlm.nih.gov/pmc/articles/PMC3628961/, https://doi.org/10.1176/appi.ajp.2012.12040474.

Frisaldi, Elisa, et al. “Understanding the Mechanisms of Placebo and Nocebo Effects.” Swiss Medical Weekly, vol. 150, no. 3536, 1 Sept. 2020, https://doi.org/10.4414/smw.2020.20340.

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Posted

2025-08-23