Why Stress Breaks Some People—and Strengthens Others

Jan 10, 2026

Understanding Vulnerability, Stress, Coping, and Resilience

Stress is unavoidable. Deadlines, uncertainty, relationship conflicts, health issues, financial pressure—these are universal human experiences. Yet the outcomes of stress vary dramatically. Some individuals deteriorate psychologically under pressure, developing anxiety, depression, or burnout. Others remain stable, recover quickly, or even grow stronger.

Psychological research has long shown that stress alone does not cause psychological breakdown. Instead, mental health outcomes emerge from the interaction between vulnerabilitystress exposurecognitive appraisal, and resilience. Over the past several decades, this interaction has been conceptualized through a series of influential frameworks that together provide a powerful lens for understanding mental health and illness.

This article synthesizes four cornerstone contributions:

  • Zubin & Spring’s concept of vulnerability
  • The vulnerability–stress model articulated by Ingram & Luxton
  • Lazarus & Folkman’s transactional model of stress and coping
  • Connor & Davidson’s work on resilience and its measurement

Together, these models explain not only why people suffer, but also why people recover.

Vulnerability: The Invisible Predisposition

In their seminal 1977 paper, Zubin and Spring proposed a radical shift in how mental disorders—particularly schizophrenia—should be understood. Rather than viewing mental illness as a condition that suddenly “appears,” they argued that individuals carry varying levels of vulnerability, or predisposition, that make them more or less susceptible to psychological breakdown under stress.

Vulnerability can stem from multiple sources:

  • Biological factors, such as genetics or neurochemical sensitivity
  • Early developmental experiences, including trauma or insecure attachment
  • Psychological traits, such as cognitive rigidity, emotional reactivity, or low self-esteem
  • Social and environmental factors, including chronic adversity or lack of support

Importantly, vulnerability is not destiny. A person with high vulnerability may function well for years—甚至 their entire life—if stress levels remain manageable. Conversely, a person with low vulnerability may still struggle when exposed to extreme or prolonged stress.

This perspective reframed mental illness as a dynamic process, not a fixed condition. Mental health, in this view, exists on a continuum and fluctuates depending on internal and external conditions.

The Vulnerability–Stress Model: When Pressure Meets Predisposition

Building on this foundation, Ingram and Luxton (2005) expanded vulnerability theory into a broader vulnerability–stress model applicable across many forms of psychopathology, including depression, anxiety disorders, and burnout.

The central idea is simple but powerful:

Psychological disorders emerge when environmental stress exceeds an individual’s capacity to cope, given their underlying vulnerabilities.

In this model:

  • Vulnerability determines sensitivity
  • Stress acts as the trigger
  • Timing, intensity, and duration of stress matter
  • Outcomes vary depending on protective factors

Crucially, the same stressor can have very different effects on different people. A job loss might be destabilizing for one person but manageable for another, depending on financial security, social support, cognitive style, and past experiences.

This model also explains why symptoms can be episodic. When stress decreases—or coping improves—functioning may return to baseline. Mental health is therefore not static, but context-dependent.q

Stress Is Not Objective: The Role of Appraisal and Coping

While vulnerability–stress models explain who is at risk, they do not fully explain how stress translates into psychological strain. This gap was addressed by Lazarus and Folkman (1984) through their transactional model of stress and coping.

Their core insight was that stress is not defined by events themselves, but by how individuals appraise those events.

According to this model, stress unfolds in two stages:

1. Primary appraisal

The individual evaluates whether an event is:

  • Irrelevant
  • Benign
  • Threatening
  • Challenging

2. Secondary appraisal

The individual assesses their resources:

  • “Can I handle this?”
  • “Do I have support?”
  • “Do I know what to do?”

Stress arises when a person appraises a situation as threatening and believes their coping resources are insufficient.

Coping strategies then come into play:

  • Problem-focused coping, aimed at changing the situation
  • Emotion-focused coping, aimed at regulating emotional responses

This framework explains why two people with similar vulnerabilities and stress exposure may experience vastly different outcomes. Perception and coping are decisive mediators between stress and psychological impact.


Resilience: More Than Just “Bouncing Back”

If vulnerability explains susceptibility, resilience explains recovery.

Connor and Davidson (2003) conceptualized resilience as a multifaceted capacity that enables individuals to adapt, endure, and regain psychological equilibrium in the face of adversity. Importantly, resilience is not simply the absence of vulnerability, nor is it a fixed personality trait.

Their work led to the development of the Connor–Davidson Resilience Scale (CD-RISC), which operationalized resilience through factors such as:

  • Emotional regulation
  • Sense of purpose
  • Adaptability
  • Persistence
  • Confidence in one’s ability to cope

Research using the CD-RISC demonstrated that resilience can vary over time and can be strengthened through experience, learning, and support.

This reframes mental health in a hopeful way: vulnerability may be partly inherited or shaped early, but resilience can be cultivated throughout life.

Putting It All Together: A Dynamic System

Taken together, these models describe mental health as a dynamic system, not a binary state of “healthy” versus “ill.”

  • Vulnerability sets the baseline
  • Stress activates the system
  • Appraisal and coping determine immediate impact
  • Resilience shapes recovery and long-term outcomes

Psychological distress, therefore, is not a personal failure—it is the predictable result of an imbalance between demands and resources.

Why This Matters—At Work and in Life

Understanding these frameworks has practical implications far beyond clinical psychology.

In workplaces, it explains why:

  • High performers burn out
  • “Resilient cultures” outperform punitive ones
  • Psychological safety matters more than pressure alone

In relationships, it explains why:

  • Conflict escalates differently for different people
  • Support can be protective even under severe stress

In mental health conversations, it replaces blame with context, compassion, and strategy.

Final Reflection

Mental health is not about eliminating stress—that is impossible. It is about managing vulnerability, interpreting stress wisely, strengthening coping, and building resilience.

When we stop asking “What’s wrong with this person?” and start asking “What pressures are interacting with which vulnerabilities, and what resources are available?”, we move closer to a science—and a culture—of sustainable psychological well-being.