What is PeopleAnalyst?

PeopleAnalyst is the front door for people-analytics research: 205+ works indexed and profiled, 40+ citation-grade findings extracted, and peer-reviewed behavioral science translated from academic to actionable — the missing manual for the people analytics you always meant to do.

What is people analytics?

People analytics is not a dashboard. It is behavioral science and statistical inference applied to workforce decisions — a discipline with its own methodology, spanning measurement, organizational design, talent, leadership, and analytics craft.

Why does AI in HR need measurement science?

AI is being deployed in high-stakes people decisions — hiring, performance, attrition — without the measurement science to evaluate whether it works or whom it harms. Construct validity, effect sizes, and criterion validity are the vocabulary for asking an AI vendor the right questions.

How is the research made accessible?

The evidence is indexed and searchable: 205+ works, 40+ citation-grade insight cards, and 8 research arcs, so the right finding reaches the right decision at the right time.

What separates good people measurement from assertion?

Good measurement has a method: construct validity, reliability, and effect-size interpretation are not optional — they are what separates evidence from assertion.

library / lib7598b4ce6e9fdc95

Immunity to Change Kegan Lahey

In a sentence

People fail to make desired changes not due to a lack of will, but because of a powerful, hidden "immunity to change"—a system of competing commitments and big assumptions that brilliantly protects them from perceived dangers—and this book provides a structured process to uncover and overcome this immunity for individual and organizational growth.

Even when our lives depend on it, we often fail to make necessary changes. This isn't a failure of willpower, but a sign of a powerful, hidden dynamic the authors call "immunity to change." This psychological immune system, composed of competing commitments and deeply held "big assumptions," actively works to maintain our current mindset, brilliantly protecting us from perceived dangers while simultaneously preventing growth. Kegan and Lahey provide a powerful, step-by-step diagnostic tool—the Immunity Map—to make this system visible. Through compelling case studies from business, government, and education, and practical exercises, they guide readers to not just understand their resistance but to design and run safe experiments to challenge their limiting beliefs. This book offers a transformative process to overcome personal and collective inertia, unlocking genuine developmental growth and enabling individuals, teams, and entire organizations to finally close the gap between their aspirations and their actual achievements.

The four lenses

Science
Statistics
Systems
Strategy

The model

This is a causal path model explaining how individuals and teams can overcome their resistance to change. The core idea is that an 'Immunity Overcoming Process' (diagnosing the immunity and testing assumptions) reduces the unquestioned validity of 'Big Assumptions.' This, in turn, weakens the 'Strength of Competing Commitments,' which allows for the development of an 'Adaptive Behavioral Repertoire.' This new behavioral capacity leads to the 'Achievement of the Improvement Goal.' A parallel outcome of the process is an advancement in 'Mental Complexity,' a form of adult development.

Immunity Overcoming Processdesign lever

The structured set of diagnostic (creating the four-column Immunity Map) and experimental (designing, running, and interpreting tests of big assumptions) activities prescribed in the book to uncover and overturn an individual's or group's immunity to change.

Perceived Validity of Big Assumptionspsychological state

The degree to which an individual or group holds their core underlying beliefs (Big Assumptions) as unexamined, absolute truths. A high level of validity means the assumptions are strong and automatically dictate responses, while a low level means they are seen as testable hypotheses.

Strength of Competing Commitmentspsychological state

The power of the hidden, self-protective goals (Column 3) that conflict with the stated improvement goal. This strength is derived from the perceived validity of the Big Assumptions and determines the persistence of obstructive behaviors.

Adaptive Behavioral Repertoirebehavioral pattern

The set of new, effective behaviors that are consistent with the improvement goal and replace old obstructive patterns. This represents the individual's or team's expanded capacity to act in ways that were previously blocked by their immunity system.

Achievement of Improvement Goaloutcome metric

The successful and sustained attainment of the specific, desired change in performance or capability as defined in Column 1 of the Immunity Map. This is the primary practical outcome of overcoming the immunity to change.

Mental Complexity Advancementoutcome metric

A developmental shift to a more sophisticated meaning-making system (e.g., from a socialized to self-authoring mind), enabling a more expansive and less egocentric grasp of reality. This is a deeper, transformative outcome of the immunity-overcoming process.

How they connect

immunity overcoming process − influences big assumption validity
big assumption validity → predicts strength of competing commitments
strength of competing commitments − predicts adaptive behavioral repertoire
adaptive behavioral repertoire → predicts achievement of improvement goal
immunity overcoming process → influences mental complexity advancement

The story

The reader The reader is a motivated leader, manager, coach, or individual who wants to make significant, lasting changes in themselves, their teams, or their organization but is frustrated by repeated failures and the powerful inertia of the status quo.

External problem

Despite sincere intentions, clear plans, and high stakes, you and your people are unable to make the changes necessary to improve performance, unlock potential, and meet new challenges.

Internal problem

You feel frustrated, skeptical, and perhaps even pessimistic about the possibility of real change, wondering why smart, dedicated people (including yourself) get stuck in self-defeating patterns.

Philosophical problem

It's just plain wrong that people with genuine desire and clear goals should be held captive by hidden forces, preventing them from growing and achieving their full potential.

The plan

Reconceive the Challenge: Understand the difference between technical problems and adaptive challenges that require mindset transformation.
Diagnose Your Immunity: Use the four-column Immunity Map to uncover your hidden competing commitments and the 'big assumptions' that hold you back.
Overcome Your Immunity: Design and run a series of small, safe experiments to test and revise your big assumptions, systematically dismantling your immune system.

Success

You and your people finally make the breakthroughs you've been striving for.
You develop a more complex and capable mindset, able to handle a wider range of challenges.
Your team and organization become more cohesive, trusting, and effective, creating a culture of continuous development.
You unlock your own and others' full potential, closing the gap between aspiration and reality.

At stake

You remain stuck, pouring resources into change efforts that yield no lasting results.
Pessimism and frustration grow as the same self-defeating patterns repeat themselves year after year.
Your organization fails to adapt to new challenges, losing its competitive edge and wasting its human talent.
You and your people never reach your full potential.

Questions this book answers

Why is meaningful personal and organizational change so difficult, even when we are highly motivated and the stakes are high?
What is the hidden psychological dynamic, the "immunity to change," that keeps us stuck?
How can we systematically diagnose our own individual and collective immunities to change using the four-column Immunity Map?
What is the process for overcoming this immunity by designing and running experiments to test our "big assumptions"?
How does overcoming immunity to change lead not just to behavioral improvement but also to an increase in mental complexity (adult development)?

Glossary

Immunity Overcoming Process: A structured, multi-step intervention designed to facilitate adaptive change by first making an individual or group's implicit resistance system visible (diagnosis) and then systematically challenging its underlying assumptions through guided experimentation (overcoming).
Perceived Validity of Big Assumptions: The degree to which an individual or group perceives their underlying 'big assumptions' as objective truth rather than as subjective, testable beliefs. High validity implies the assumption is an unquestioned part of one's reality (subject), while low validity means it is a hypothesis that can be examined (object).
Strength of Competing Commitments: The motivational force of the hidden, self-protective goals that run counter to a stated improvement goal. These commitments function to prevent the anxiety or danger that the big assumptions predict will occur if the person changes.
Adaptive Behavioral Repertoire: The range and frequency of effective behaviors an individual or team can enact that support their stated improvement goal. A broader repertoire signifies increased capability and flexibility in situations that were previously governed by the immunity system's obstructive behaviors.
Achievement of Improvement Goal: The extent to which the individual or team successfully realizes the specific improvement goal stated in Column 1 of their Immunity Map, reflecting a sustained change in capability or performance.
Mental Complexity Advancement: A qualitative transformation in the underlying structure of how a person makes meaning of the world, characterized by a move from one developmental plateau to the next (e.g., from the Socialized Mind to the Self-Authoring Mind). It represents an expansion of what a person can be aware of and take perspective on.