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Vertical Development Practices: How Adults Grow, Not Just Add Skills

Heat, colliding perspectives, and sense-making — and what the research can and cannot promise

How do adults actually grow vertically, not just add skills?

The practitioner literature on vertical development points to three conditions working together: a "heat experience" your current way of thinking cannot handle, contact with people who see the world differently, and time to make sense of both with a guide (Petrie, Center for Creative Leadership, 2015). A few peer-reviewed intervention studies, including one of 10-month leadership programs, found measurable gains in ego development, but no method reliably moves a person a whole stage, and the change is slow.

"Vertical development" is a practitioner name for something adult development researchers have studied for decades: change in how a person makes meaning, as opposed to what they know. Nick Petrie at the Center for Creative Leadership put the distinction plainly — horizontal development is more information, skills and competencies; vertical development is more complex and sophisticated ways of thinking. In 2015 he interviewed 30 practitioners across eight countries and found they converged on three conditions: heat experiences that disrupt habitual thinking, colliding perspectives that widen it, and elevated sensemaking that integrates what was learned. The practices below put those conditions, and the research-backed tools around them, into a form one person can use. Two honest notes before starting. First, most of this is practitioner synthesis, not outcome research; the peer-reviewed intervention studies that exist are few and small next to the claims often made. Second, a later stage is not a better person — using stages to rank people is a misuse of the research.

Pratiques

Comment ces pratiques s'articulent

Every practice on this page arranges the same three-part sequence that practitioners converge on: something has to show a person that their current way of making sense is not enough, other people’s ways of seeing have to supply alternatives, and supported reflection has to integrate those alternatives until a more complex view holds without help. Heat, collision and sense-making are the conditions; mapping a hidden commitment, auditing goals, working with support, and using assessments carefully are ways to create or read those conditions in one person’s life. None of them installs a stage; they make it more likely that slow structural change has what it needs.

Why does leadership training not change how people actually think and act?

Nick Petrie of the Center for Creative Leadership argues that most programs focus on horizontal development — more information, skills and competencies — when many leaders already know what to do and lack a more complex way of making sense of their situation. He found practitioners converging on three conditions for vertical development: a heat experience that disrupts habitual thinking, colliding perspectives that widen it, and elevated sensemaking that integrates it. Programs with only one or two of these, or that run as one-off events, tend not to stick. In one peer-reviewed study of 335 adults in mostly 10-month community leadership programs, programs that deliberately added psychosocial challenges were significantly more effective at triggering later-stage development, which fits that pattern without proving any single method works.

Is a stretch assignment enough on its own to grow vertically, or do I need more?

Petrie describes heat as necessary but not sufficient. A heat experience — first-time, high-stakes, uncertain, watched by important people, uncomfortable — disrupts a person’s current way of making sense. Without exposure to different perspectives, he observes, people tend to fall back to the conclusions they always reach; without time and a guide to make sense of the experience, the insight does not hold once they return to ordinary work. In practice that means pairing a stretch with deliberate contact with people who see the situation differently and with regular reflection alongside a coach or mentor.

How do I change a pattern I keep repeating even though I want to stop?

Kegan and Lahey propose that a sincere goal is often blocked by a hidden competing commitment, protected by a big assumption the person treats as simply true — for example, a commitment to never losing control resting on the assumption that delegating will make you redundant. Mapping that system and running small, safe tests of the assumption turns something you are subject to into something you can examine. Doing this with a coach or mentor helps, because the assumptions that hold a pattern in place are by definition hard to see from inside. Practitioners interviewed by Petrie called the method the gold standard of vertical practices, though that is practitioner judgment rather than trial evidence.

Why can I think more clearly with a mentor than on my own, and does that mean I am faking it?

Kurt Fischer’s skill theory predicts exactly this. The level at which a person performs depends on the support the context provides: the best performance, with strong support, is the optimal level, and unaided performance is the functional level. In a study of 156 students aged 14 to 28, reflective-judgment scores were significantly higher on an interview designed to support optimal reasoning than on a standard one. Both levels are real. The gap marks a more complex way of thinking that is partly available, and practicing it with support and then gradually without it is one way to work at that edge.

Should I take a developmental stage assessment to know where I am, and what are the risks?

An established method such as the Subject-Object Interview or a rated sentence completion test can show the structure of your meaning-making in a way self-reflection cannot. Helsing and Howell used the Subject-Object Interview with leaders in a World Economic Forum fellowship and found their successes and struggles related to developmental stage, though not always straightforwardly. The risk is misuse: because stages look like a ladder, scores get used to rank people, and Petrie cautions explicitly that later-stage thinkers are not better people. Use an assessment to choose what to practice, debrief it with an experienced practitioner, and keep it out of decisions about anyone’s worth.

Comment choisir entre elles ?

If you are not sure whether a struggle is about skill or about how you see the situation, start with the goal audit. If you have mastered your role and feel restless, look for a heat experience. If you are already in heat — a new role, a crisis, a transition — do not add more; add colliding perspectives and protected reflection with a guide. If one specific change keeps failing despite real effort, map the competing commitment behind it. If you can think clearly with support but not alone, practice in that gap. And if you are choosing a program, or deciding whether to use a stage assessment, choose the longer, challenge-rich option and keep any scores away from ranking people.

Ce que ces approches ne tranchent pas

"Vertical development" is a practitioner framing laid over constructive-developmental research by Kegan, Loevinger, Cook-Greuter, Torbert and others; the three conditions come from Petrie’s interviews with 30 practitioners, not from outcome studies. Interventions that reliably move a person a whole stage are not established. The peer-reviewed intervention studies cited here are few: one compared existing community leadership programs rather than randomizing individuals, and another tested two intervention groups against one matched control. Stage change is slow, people perform differently with and without support, and measures can vary across occasions. Stage language is also easy to misuse: a later stage describes more complex meaning-making, not a better or more valuable person, and using stages to rank colleagues or select people turns a developmental map into a hierarchy the research does not support.

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Questions fréquentes

How do adults actually grow vertically, not just add skills?

The practitioner literature on vertical development points to three conditions working together: a "heat experience" your current way of thinking cannot handle, contact with people who see the world differently, and time to make sense of both with a guide (Petrie, Center for Creative Leadership, 2015). A few peer-reviewed intervention studies, including one of 10-month leadership programs, found measurable gains in ego development, but no method reliably moves a person a whole stage, and the change is slow.

Comment fonctionne « Seek a heat experience on purpose » ?

Petrie’s first condition is the heat experience: a complex situation that disrupts a person’s habitual way of thinking, so they discover that their current way of making sense is inadequate and start searching for a better one. Adult development research proposes a similar trigger — Manners, Durkin and Nesdale describe stage transition as a response to experiences that are structurally disequilibrating, personally salient, emotionally engaging, and interpersonal. Comfort confirms the existing frame; heat is what makes it visibly insufficient.

Comment fonctionne « Put yourself where perspectives collide » ?

Petrie’s second condition is colliding perspectives: exposure to people with different worldviews, opinions, backgrounds and training, which both challenges a person’s existing mental models and increases the number of perspectives through which they can see. Garvey Berger and Johnston name taking multiple perspectives as one of three habits for leading in complexity. Without collision, Petrie notes, a disrupted person tends to fall back to the conclusions they always reach.

Comment fonctionne « Make sense of it with a guide, not alone » ?

Petrie’s third condition, elevated sensemaking, is where a person integrates a heat experience and new perspectives into a larger worldview that, with time, stabilizes. He names three ingredients: time for reflection, a map of the stages, and a guide who knows the terrain. A coach or mentor helps a person see the beliefs and mental maps they are subject to — the ones they cannot see from inside — which is difficult to do alone.

Comment fonctionne « Map what keeps you from changing » ?

Kegan and Lahey propose that people fail to make changes they sincerely want because a hidden competing commitment, protected by a "big assumption," works against the goal. Mapping that system makes visible a belief the person has been subject to, and small experiments test whether the belief is actually true. Petrie reports that more than one practitioner he interviewed called this the gold standard of vertical practices, because it pairs action with reflection on what holds a person at their current way of making sense.

Comment fonctionne « Audit your goals: skill gap or sense-making gap? » ?

Petrie defines horizontal development as more information, skills and competencies, and vertical development as more complex and sophisticated ways of thinking, and recommends checking whether an organization is over-focused on the first. Applied to one person, the audit separates goals that a course would solve from goals where you already know what to do and still cannot do it — a sign the limit is in how you make sense of the situation.

Comment fonctionne « Work at your edge with support, then without it » ?

Kurt Fischer’s skill theory holds that the level at which a person performs depends on the support the context provides: the highest level, reached with strong support, is called the optimal level, and what a person does unaided is the functional level. In a study of reflective judgment, people aged 14 to 28 scored significantly higher when the interview supported their best reasoning than when it did not. The gap between the two is where a more complex way of thinking is already partly available and can be practiced until it holds without help.

Comment fonctionne « Use a developmental assessment for insight, never for ranking » ?

A developmental assessment can show a person the structure of their meaning-making that they cannot see from inside. The Subject-Object Interview, used by Kegan and Lahey and by Garvey Berger, is a roughly 90-minute face-to-face interview; sentence completion tests are scored by accredited raters. Because stage measures look like a ladder, Petrie warns they can be used to imply that people at later stages are inherently better, which they are not.

Comment fonctionne « Choose months of challenge with support over one-off events » ?

Petrie argues that leadership programs often fail because they hit only one or two of the three conditions and run as events rather than processes. The few outcome studies fit the shape of that argument: in the largest, 10-month programs that deliberately added psychosocial challenge outperformed standard ones at triggering later-stage development. Stage change is slow, so short programs mostly add horizontal skill.

Why does leadership training not change how people actually think and act?

Nick Petrie of the Center for Creative Leadership argues that most programs focus on horizontal development — more information, skills and competencies — when many leaders already know what to do and lack a more complex way of making sense of their situation. He found practitioners converging on three conditions for vertical development: a heat experience that disrupts habitual thinking, colliding perspectives that widen it, and elevated sensemaking that integrates it. Programs with only one or two of these, or that run as one-off events, tend not to stick. In one peer-reviewed study of 335 adults in mostly 10-month community leadership programs, programs that deliberately added psychosocial challenges were significantly more effective at triggering later-stage development, which fits that pattern without proving any single method works.

Is a stretch assignment enough on its own to grow vertically, or do I need more?

Petrie describes heat as necessary but not sufficient. A heat experience — first-time, high-stakes, uncertain, watched by important people, uncomfortable — disrupts a person’s current way of making sense. Without exposure to different perspectives, he observes, people tend to fall back to the conclusions they always reach; without time and a guide to make sense of the experience, the insight does not hold once they return to ordinary work. In practice that means pairing a stretch with deliberate contact with people who see the situation differently and with regular reflection alongside a coach or mentor.

How do I change a pattern I keep repeating even though I want to stop?

Kegan and Lahey propose that a sincere goal is often blocked by a hidden competing commitment, protected by a big assumption the person treats as simply true — for example, a commitment to never losing control resting on the assumption that delegating will make you redundant. Mapping that system and running small, safe tests of the assumption turns something you are subject to into something you can examine. Doing this with a coach or mentor helps, because the assumptions that hold a pattern in place are by definition hard to see from inside. Practitioners interviewed by Petrie called the method the gold standard of vertical practices, though that is practitioner judgment rather than trial evidence.

Why can I think more clearly with a mentor than on my own, and does that mean I am faking it?

Kurt Fischer’s skill theory predicts exactly this. The level at which a person performs depends on the support the context provides: the best performance, with strong support, is the optimal level, and unaided performance is the functional level. In a study of 156 students aged 14 to 28, reflective-judgment scores were significantly higher on an interview designed to support optimal reasoning than on a standard one. Both levels are real. The gap marks a more complex way of thinking that is partly available, and practicing it with support and then gradually without it is one way to work at that edge.

Should I take a developmental stage assessment to know where I am, and what are the risks?

An established method such as the Subject-Object Interview or a rated sentence completion test can show the structure of your meaning-making in a way self-reflection cannot. Helsing and Howell used the Subject-Object Interview with leaders in a World Economic Forum fellowship and found their successes and struggles related to developmental stage, though not always straightforwardly. The risk is misuse: because stages look like a ladder, scores get used to rank people, and Petrie cautions explicitly that later-stage thinkers are not better people. Use an assessment to choose what to practice, debrief it with an experienced practitioner, and keep it out of decisions about anyone’s worth.

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