5.1 Mental Health and Stress: Key Theories and Concepts

5.1 Mental Health and Stress

• Health definition (World Health Organization)
  • Health is not merely the absence of illness but a state of complete physical, mental, and social well-being.
• Mental health focus
  • Mental health is about realizing abilities, coping with life’s stresses, working productively, and contributing to the community.
  • Maintaining mental health at work is important but challenging because work can be a major source of stress.
• What is stress?
  • Stress is a reaction to demands in our environment.
• Key terms in stress research
  • Stress trigger: what causes stress
  • Stressor: the source of stress
  • Stress response: how the body reacts to stress
• Important Steps in Stress Research (historical context)
  • Stress is a common experience today (e.g., work, exams, shopping, daily tasks).
  • Stress is often perceived as negative, causing pressure and strain.
  • The term "stress" was not widely known a century ago.
  • Over the past 100 years, important research milestones have shaped understanding of stress, with discoveries linked to key researchers.
• Hans Selye (1907–1982)
  • Father of stress research; introduced the concept of the stress response and the General Adaptation Syndrome (GAS).
  • GAS is a three-stage pattern of the body’s reaction to stress:
  • Alarm (fight or flight): body prepares for action.
  • Resistance: body adapts to handle the stress over time.
  • Exhaustion: body becomes worn out and cannot sustain the stress.
  • Problems arise when stress lasts too long without recovery, leading to negative feelings or distress.
  • Stress can be beneficial in some cases, known as eustress, which can motivate and energize.
• Yerkes–Dodson Law (1908)
  • Describes the relationship between stress and performance as an inverted U-shape.
  • Performance is optimal at a moderate level of stress (arousal); too little or too much stress reduces performance.
  • Conceptual representation (common formalization):
  • P(A) = -k\,(A - A{\text{opt}})^2 + P{\max}, \quad k>0,
  • where $A$ is arousal level, $A{\text{opt}}$ is the optimum arousal level, and $P{\max}$ is the maximum performance.
• Richard Lazarus (1922–2002)
  • Critiqued universal stress theories and advanced stress research with the transactional stress model.
  • Stress arises from how well an environment matches an individual’s needs (person–environment fit).
  • Emphasizes cognitive appraisal: different individuals may view the same situation as harmless or stressful.
• Conceptualizations of stress (evolution over time)
  • Sonnentag and Frese (2013) identified four main ideas of stress:
• Stimulus concept
  • Stress comes from environmental stimuli but ignores individual differences in reaction to the same stimulus.
• Reaction concept
  • Stress focuses on the body’s physical response but ignores that different things can trigger the same response.
• Transactional concept
  • Stress results from the interaction between a person and their situation; improves on prior views but is not always well-researched.
• Discrepancy concept
  • Stress arises when there is a mismatch between what a person needs and what their environment provides.
• Synthesis and perspective
  • These ideas exist alongside each other, showing that stress has different meanings depending on the perspective.
• Connections and implications (practical, ethical, and theoretical)
  • Practical: informs workplace health strategies, coping mechanisms, and resilience training.
  • Theoretical: integrates physiological, cognitive, and environmental perspectives of stress.
  • Ethical/philosophical: balance recognizing stress with potential positive forms (eustress) and avoid over-pathologizing normal stress.
  • Foundational principles: appraisal, adaptation, and the interaction of person and environment.
• Summary of key takeaways
  • Stress is multi-dimensional: biological, cognitive, and environmental aspects.
  • Multiple models exist to explain different aspects of stress (GAS, Yerkes–Dodson, transactional model, and the four conceptualizations).
  • Understanding the distinctions between stress trigger, stressor, and stress response aids in measurement and intervention.
• Notable years and milestones
  • Selye: 1907–1982 (General Adaptation Syndrome, GAS; three stages)
  • Yerkes: 1908 (Yerkes–Dodson Law)
  • Lazarus: 1922–2002 (Transactional Stress Model)
  • Sonnentag & Frese: 2013 (four core stress concepts)