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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
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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.

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.