When Reality Doesn’t Match the Internal Map: Neurodivergence and Expectation-Based Distress

Written by: Jasmine K. Y. Loo (Psychologist)

For many neurodivergent individuals (NDs), distress is not always about the thing itself. Sometimes, it’s about the gap between what we expected… and what reality turned out to be.

This can be difficult for others to understand, particularly when the “trigger” appears small or insignificant from the outside. But for many neurodivergent people, expectation and predictability play a much bigger role in nervous system regulation than people realise.

Years ago, not long after recognising I was autistic myself, I had to handle a full-scale meltdown from a child over a board game. The box showed one of the game pieces in blue, but the actual piece inside the box was orange.

To many people, this might seem trivial. The game still functioned exactly the same way. But to the child, something felt deeply wrong. The reality did not match the expectation their brain had already mapped out. I remember gently telling them several times, “Sometimes things aren’t what they seem, or what we think they’ll be.”

It was resolved without any major issues arising. And then, barely a week later, I found myself standing in a phone store, going in circles with a staff member over a charging cable.

I'd purchased a new phone. The image on the box clearly showed a charging cable included. Every phone I’d previously owned had also come with one. But when I opened the box, there was no cable.

The staff member kept saying, “It’s just a cable. They don’t cost much.” Meanwhile, I kept pointing at the box between us saying, “It’s not the cost. It’s the principle.” I wasn't hostile or rude, but was definitely calmly insistent. The poor staff member looked completely bewildered.

At the time, I didn’t fully understand why I just couldn't let that go after the first round of that exchange. It was only days later that I connected the two incidents. The child’s meltdown and my frustration were not identical experiences, but they were rooted in a similar nervous system process: reality had violated the internal expectation map.

Why This Can Feel So Distressing

Many NDs rely heavily on predictability to create a sense of cognitive and emotional safety. Our brains are often constantly processing, pattern-detecting, and trying to reduce uncertainty.

Expectations help us prepare mentally for what’s coming next. So, when something sharply deviates from what was anticipated, the nervous system may experience far more distress than others expect.

Importantly, this is not necessarily about rigidity, entitlement or “being dramatic.” Often, it’s about incongruence. The brain prepared for one reality; another reality appeared instead. And the nervous system struggles to reconcile the mismatch quickly.

How This May Show Up Across the Lifespan

In children, expectation-based distress might look like:

• Meltdowns over changed plans

• Distress when foods look different than expected

• Strong reactions to objects being “wrong”

• Difficulty transitioning unexpectedly

In adults, it may appear differently:

• Becoming disproportionately upset over misleading information

• Feeling stuck on matters of principle

• Struggling to let go of perceived inconsistencies

• Replaying situations where expectations and outcomes didn’t align

From the outside, others may only see the surface behaviour and say/think:“It’s just a cable.”“It’s not a big deal.”“Just move on.”

But internally, the nervous system may still be trying to process the mismatch itself.

Understanding the Difference Between the Object and the Incongruence

One thing that can help is learning to pause and ask, “Am I distressed by the object itself, or by the expectation mismatch?” Sometimes, recognising the mechanism underneath the reaction can reduce shame.

Because many neurodivergent adults grow up being told they are “too sensitive” or “overreacting,” especially when their distress doesn’t seem proportionate to others. But often, the reaction makes much more sense when viewed through the lens of predictability, patterning and nervous system regulation.

Supporting Expectation-Based Distress

This does not mean NDs should simply be forced to “be more flexible.” Nor does it mean the world must perfectly accommodate every expectation.

Instead, support often involves a balance of:

• Increasing self-awareness around triggers

• Building tolerance for small unpredictabilities gradually

• Giving ourselves more processing time

• Reducing shame around our reactions

• Practising flexibility in lower-stakes situations first

It can also help when others avoid dismissing the distress outright. Even when the reaction seems disproportionate externally, the underlying nervous system experience is still real.

These Struggles Don’t Necessarily Disappear in Adulthood

One of the biggest things I’ve learned since my own diagnosis is that many neurodivergent struggles do not simply vanish with age. Sometimes, they just become more socially acceptable, more internalised, or expressed differently.

The child distressed over the orange game piece and the adult arguing over the missing cable are not as different as they first appear. Both were trying to make sense of a world that suddenly no longer matched the internal map their brain had prepared for.

And sometimes, understanding that can help us respond with a little more compassion — both toward neurodivergent children, and toward ourselves.