The Personal Stability Index
The Personal Stability Index (PSI) is an integrative framework developed by Oliver Züger to explore how six interacting dimensions may contribute to personal stability across changing conditions.
How do personal resources and external circumstances interact when people face pressure, uncertainty and change?
The framework brings together established psychological concepts in a structured model and is being developed through academic research and applied exploration.
PSI explores functional stability as the capacity to maintain effective functioning, adapt when conditions change, and recover after disruption.
Its purpose is to support reflection and research into how baseline tendencies, circumstances, resilience, mindset, purpose and stress interact.
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Why Develop
Another
Framework?
Existing psychological theories provide valuable perspectives on personality, resilience, motivation, wellbeing and stress.
PSI brings selected concepts into a structured framework for exploring how personal resources and external conditions interact.
Rather than examining each dimension in isolation, it considers how their relationships may influence a person’s capacity to function, adapt and recover.
Its purpose is not to replace existing theories, but to complement them through an integrative perspective that supports reflection, research and the exploration of practical applications.
The PSI Framework
H = G + (C × R) + (M × P) − S
H represents the proposed PSI index of functional stability.
- G — Genetic Base Point
- C — Circumstances
- R — Resilience
- M — Mindset
- P — Purpose
- S — Stress
The formula proposes interactions between Circumstances and Resilience, and between Mindset and Purpose, while Stress places demands on the overall configuration.
This is a conceptual relationship intended for research and reflection. It is not a clinically validated diagnostic equation.
The Six Dimensions of PSI
The Personal Stability Index brings together six interconnected dimensions: Genetic Base Point, Circumstances, Resilience, Mindset, Purpose and Stress.
The framework explores how these dimensions interact and how their configuration may change over time.
GENETIC BASE POINT (G)
Relatively enduring predispositions and baseline tendencies that provide a starting point for understanding a person’s responses.
Within PSI, this refers to perceived baseline patterns. It does not mean that a self-report questionnaire identifies genes.
CIRCUMSTANCES (C)
The external and relational conditions surrounding a person, including relationships, work schedules, finances, living arrangements and organisational support.
This dimension draws attention to conditions that may support stability or create additional demands.
RESILIENCE (R)
The capacity to adapt, recover and continue functioning following difficulty, disruption or change.
Resilience is considered alongside the circumstances and support available to the person.
MINDSET (M)
How a person interprets situations, perceives available options and approaches challenges and learning.
This includes their sense of agency and the way uncertainty or change is understood.
PURPOSE (P)
The sense of meaning, direction and valued goals that supports sustained effort and engagement.
Purpose concerns what makes continued effort worthwhile, including personal commitments and professional identity.
STRESS (S)
The experienced burden of demands and pressure acting on the overall configuration, including accumulated overload and reduced recovery.
PSI considers this burden alongside the resources and conditions available to the person.
Looking Beyond
Individual Factors
PSI explores personal stability through the relationships between its six dimensions, rather than treating any single factor as a complete explanation.
Two people may report similar levels of stress while having different circumstances, recovery resources, interpretations and sense of purpose.
The framework proposes that examining these configurations over time may help identify where support or changes to surrounding conditions could be most useful.
These proposed relationships require empirical testing and refinement.
Ongoing Research
The Personal Stability Index is being developed through academic research and applied exploration. Its proposed relationships require empirical testing and refinement.
The conceptual paper “Psychological Stability Under Operational Pressure: A Conceptual Application of the Personal Stability Index to Aviation” explores possible applications in aviation and outlines a staged research programme.
Proposed research includes questionnaire review, measurement evaluation, repeated assessments, operational observations and cross-cultural analysis.
The aim is to investigate whether PSI profiles and their proposed interactions help explain how people maintain functioning, adapt and recover under changing conditions.
Looking Ahead
Potential areas for exploring PSI include education, leadership development, Human Factors, aviation, organisational wellbeing, coaching and interdisciplinary research.
The aviation paper proposes applications in individual reflection, organisational learning, training research and support during professional transitions.
These possibilities remain areas for investigation. PSI is not intended to diagnose mental health conditions, determine fitness for duty or predict operational incidents.
Explore the Framework
Explore the concepts behind PSI, its proposed applications and the research questions guiding its development.
Whether you are a researcher, educator, aviation professional, organisational leader or curious reader, you are welcome to explore the work and contribute to the conversation.