CHANGE YOUR MIND, NOT YOUR BEHAVIOUR

Senior leaders are rarely short of insight, capability, or effort. Yet many find themselves in a recurring dynamic; they make a commitment to change and then revert to their ‘problem’ behaviour under pressure. In my view, this is not a failure of willpower or discipline. It is the brain doing what it is designed to do: reducing uncertainty, conserving energy, and defaulting to well-rehearsed patterns -  particularly when the nervous system is under load

But, given that many of us would like to create sustainable change, how do we go about doing that?

This paper offers a contemporary, neuroscience-informed view of durable change.

The central thesis is simple:

• Behaviour is an output.

• Thinking patterns sit beneath behaviour

• And beneath our thinking are our mental models:  the internal predictive maps that shape how we interpret events and assess what is safe, risky, or important.

These models organise identity, values and priorities, beliefs and assumptions, expectations of others, and the rules we use (often unconsciously) to navigate the world.

So, if we want to create change that holds, we work upstream first — at the level of meaning and appraisal: how we interpret what is happening, what we believe it signifies, and what we perceive to be at stake. From there, we can shape thinking patterns, to act differently – and repeatedly, until the new response holds habitually and under pressure.

A familiar pattern

A CEO receives feedback that they are “too intense” in key forums. They agree. They can even see it. They commit to ‘slowing down’ and ‘inviting others in’. For a few weeks it works.Then the stakes rise: an investor call, a board discussion, a critical delivery risk. The CEO tightens. They interrupt more. They push harder. Afterwards they are frustrated: “I knew better. Why did I do that again?”The answer is rarely behavioural. It is structural. Under pressure, the brain defaults to what reduces uncertainty quickly.

Why behaviour change fails under pressure

Most behaviour-change advice assumes a simple sequence: notice behaviour → choose alternative behaviour → repeat until it sticks.The difficulty is that pressure changes the operating conditions. Acute stress can impair the prefrontal cortex functions we rely on for perspective-taking, working memory, inhibition, and flexible decision-making. When this happens, leaders lose access to slower, more deliberative forms of thinking and default to faster, more automatic responses.

In Thinking, Fast and Slow, Daniel Kahneman explains why this happens: under pressure, we rely less on System 2 thinking — reflective, effortful, and deliberative — and default to System 1, which is fast, automatic, and habit-based. In the moment, these responses feel efficient and necessary; over time, they can reinforce the very patterns leaders are trying to change

This is why leaders can genuinely intend to behave differently, yet revert when uncertainty and threat rise. The driver is not a lack of commitment; it is a nervous system doing its best to cope.

A contemporary lens: internal models, prediction, and meaning

A growing body of neuroscience frames the brain less as a passive receiver of reality and more as a prediction engine: it continuously anticipates what will happen next, and prepares the body and mind accordingly. This matters for leadership because prediction is shaped by prior experience — and by the internal models we carry about who we are, what matters, what is dangerous, and what success requires. In other words, the brain’s predictions are not neutral; they are meaningful. When leaders ‘revert’, they are often returning to an internal model that once delivered safety, competence, belonging, or control.

Mental models: the layer beneath thinking

When leaders say, “I need to think differently,” they are often pointing to a middle layer of the system.

In practice, I find it helpful to work with three layers:

1. Mental models (meaning-making): identity, values, priorities, underlying assumptions, and learned expectations shaped by what is rewarded or feared.

2. Thinking (interpretation): the stories and frames applied to events (“this is a threat”, “I must control this”, “if I pause I’ll look weak”).

3. Behaviour (action): what we do and say.

If we work only at layer 2 or 3, change often requires ongoing effort. If we work at layer 1, thinking reorganises and behaviour follows with far less force.

Identity, values, and priorities are not ‘soft’ — they are organising principles

Identity is the lived answer to: “who am I?” and “what is important to me”.

Values and priorities determine what the brain treats as salient. They shape attention, interpretation, and action-readiness. In high-stakes roles, leaders often hold competing values at the same time — for example, decisiveness and inclusion, care and accountability, speed and stewardship. When these are implicit, the leader’s behaviour can look inconsistent. When they are explicit, the leader can hold tension without collapsing into reflex.

Where habits fit (and why identity matters)

Habits matter — they are the behavioural grooves that make leadership efficient. But habits are easier to build when they are congruent with identity and meaning. As James Clear (Atomic Habits ) has pointed out, identity-based habits tend to stick better than outcome-based habits because they align with how we see ourselves. Research on identity-based motivation shows that when a particular identity is activated, it influences how we interpret challenge and how willing we are to act. Identity, then, is not just narrative - it is a driver of motivation and behaviour.

Implications for 1:1 coaching

In 1:1 work, the aim is not to ‘fix’ leaders. It is to help them see the organising patterns of their own mind — particularly under pressure. When leaders can name the mental-model that is driving them, they gain choice. They can decide when it is useful and when it is costly. This is where sustainable change begins: not at the level of willpower, but at the level of awareness, meaning, and choice.

Implications for executive teams: collective meaning-making

Executive teams also operate through shared mental models - often unspoken. These include assumptions about what is safe to say, who holds authority, how conflict is handled, what success requires, and what is punished. When teams only work at the level of behaviour (“communicate better”, “be more collaborative”), change rarely holds.

When teams can surface how they are collectively making meaning; what is driving their avoidance, intensity, compliance, or fragmentation, they can change the system they are inside. In this sense, executive team development is as much about alignment as it is about collective maturity — the capacity to hold tension, difference, and responsibility without retreating into familiar patterns

Closing reflection

Durable change is not the result of trying harder to behave differently. It is the result of seeing more clearly: the meaning you are making, the identity that is being protected, the assumptions shaping your thinking, and the predictions your nervous system is running under pressure. When those become conscious, leaders and teams can do something that looks simple but is deceptively profound … they can choose.

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References

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