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Related Experiment Videos

Event valence and unrealistic optimism.

Ron S Gold1, Kate Martyn

  • 1School of Psychology, Deakin University, Burwood, Victoria, Australia.

Psychological Reports
|August 23, 2003
PubMed
Summary

Unrealistic optimism, the tendency to overestimate positive outcomes, was greater for negative events than positive ones. This effect occurred regardless of whether the health event was controllable or uncontrollable.

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Area of Science:

  • Psychology
  • Cognitive Psychology
  • Health Psychology

Background:

  • Unrealistic optimism, also known as optimistic bias, is a cognitive bias where individuals overestimate their likelihood of experiencing positive events and underestimate their likelihood of experiencing negative events.
  • Event valence, referring to the desirability or undesirability of an outcome, may influence the degree of unrealistic optimism observed.
  • Understanding factors influencing unrealistic optimism is crucial for health behavior interventions and risk perception.

Purpose of the Study:

  • To investigate the impact of event valence (positive vs. negative) on unrealistic optimism regarding health-related events.
  • To examine whether event controllability moderates the relationship between event valence and unrealistic optimism.
  • To explore the underlying psychological mechanisms, such as motivational accounts and prospect theory, that may explain the observed effects.

Main Methods:

  • Ninety-four university students assessed the comparative likelihood of experiencing controllable or uncontrollable health events.
  • Event valence was manipulated by framing events as either promoting desirable outcomes (positive valence) or preventing undesirable outcomes (negative valence).
  • Participants rated their likelihood of experiencing or avoiding these framed health events.

Main Results:

  • Unrealistic optimism was significantly greater for negative valence events compared to positive valence events.
  • This effect of event valence on unrealistic optimism was consistent across both controllable and uncontrollable health-related events.
  • The findings suggest that individuals exhibit greater optimism bias when anticipating negative outcomes than positive ones.

Conclusions:

  • Event valence, particularly its negative aspect, plays a significant role in amplifying unrealistic optimism.
  • The combination of motivational factors driving optimism and prospect theory's principles of loss aversion can explain these findings.
  • These results have implications for understanding risk perception and designing effective health communication strategies.

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