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Related Experiment Videos

Optimism, positive affectivity, and salivary cortisol.

Julian C L Lai1, Phil D Evans, Sik Hung Ng

  • 1City University of Hong Kong, Hong Kong, People's Republic of China. ssjulwin@cityu.edu.hk

British Journal of Health Psychology
|October 22, 2005
PubMed
Summary

Positive psychological states like optimism and positive affect significantly influence salivary cortisol levels, impacting stress response more than negative states. This highlights the importance of mental well-being for neuroendocrine regulation.

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Area of Science:

  • Psychoneuroendocrinology
  • Stress Physiology
  • Positive Psychology

Background:

  • Research on stress and salivary cortisol predominantly examines negative psychological states.
  • Positive psychological conditions, such as optimism and positive affect, are increasingly recognized for their influence on neuroendocrine regulation.
  • The impact of positive psychological states on cortisol secretion requires further investigation, controlling for negative counterparts.

Purpose of the Study:

  • To investigate the effects of optimism and positive affect on diurnal salivary cortisol patterns.
  • To differentiate the impact of positive psychological resources from their negative counterparts on cortisol secretion.
  • To examine the influence of optimism and positive affect on the cortisol awakening response and diurnal decline.

Main Methods:

Related Experiment Videos

  • A study involving 80 Hong Kong Chinese participants assessed optimism, pessimism, positive affect, and negative affect.
  • Salivary cortisol was measured across six samples daily for two consecutive days.
  • Statistical analyses, including two-way ANOVAs with repeated measures, controlled for negative psychological conditions and mood states.

Main Results:

  • Higher optimism was linked to reduced cortisol secretion during the awakening response, particularly in men.
  • Optimism did not significantly affect cortisol levels during the diurnal decline phase.
  • Elevated generalized positive affect correlated with lower cortisol levels during diurnal decline, independent of negative affect and mood.

Conclusions:

  • Positive psychological resources, specifically optimism and generalized positive affect, demonstrate a substantial impact on cortisol secretion.
  • These findings underscore the significance of positive mental states in physiological regulation and overall well-being.
  • Further research should focus on the role of positive psychological factors in health and stress management.