The Marshmallow Test, ADHD, and the Human Cost of Misunderstood Nervous Systems

The marshmallow test got mentioned today and my brain instantly went to ADHD before addiction was even brought into the conversation.

But the second addiction and later life outcomes got mentioned as well, that was it really.

Because ADHD already has such a heavily documented relationship with:

dopamine dysregulation,

impulsivity,

reward seeking,

novelty seeking,

emotional regulation difficulties,

addiction vulnerability,

masking,

shame,

burnout,

and chronic nervous-system strain.

So my immediate thought was not:

“some children could wait and some could not.”

It was:

“Hang on… was ADHD ever meaningfully accounted for in any of this?”

Because if later outcomes from delayed gratification studies showed links with addiction vulnerability, impulsivity and long-term behavioural outcomes, then surely somebody at some point had to ask what was actually happening underneath the behaviour itself.

Because I do not think waiting is neurologically equal for everybody.

And I do not think impulsivity is anywhere near as simple as people often reduce it down to either.

If somebody already struggles with:

dopamine regulation,

understimulation,

emotional overwhelm,

restlessness,

internal discomfort,

or the exhausting effort of constant self-regulation…

then immediate reward may not simply feel enjoyable.

It may feel relieving.

And I think that distinction matters massively.

Particularly when later research around the marshmallow test itself apparently started questioning whether it was ever purely measuring self-control in the first place.

Because suddenly things like:

trust,

stress,

environment,

predictability,

and whether the child genuinely believed waiting would safely result in reward…

all started entering the conversation too.

Which honestly changes the entire feel of the study.

Because now the question is no longer just:

“Who had good self-control?”

It also becomes:

“What was each nervous system actually experiencing in that moment?”

And the more I sat with it, the more my brain kept widening the question out further.

Because untreated ADHD, trauma, emotional dysregulation and addiction vulnerability are massively overrepresented across:

addiction services,

probation,

criminal justice,

domestic abuse environments,

burnout,

relationship instability,

and high-stress systems generally.

Not because ADHD “causes” criminality or abuse.

And not because accountability suddenly disappears.

But because unsupported nervous systems, chronic shame, poor emotional regulation, trauma, masking, addiction vulnerability and years of misunderstanding can shape human behaviour in enormous ways over time.

And I think that is the part I cannot stop circling.

If some of these links around impulsivity, reward processing, addiction vulnerability and behavioural outcomes were already emerging decades ago…

how much suffering escalated because people were repeatedly treated as behavioural problems before anybody properly understood what their nervous system was struggling with underneath it all?

How many people grew up believing they were:

lazy,

difficult,

aggressive,

attention seeking,

careless,

weak,

too much,

or fundamentally broken…

when actually they were trying to survive inside nervous systems that had never been understood, supported or regulated safely in the first place?

Not every addiction could have been prevented.

Not every life could have been “saved.”

Human beings are far too complicated for simplistic conclusions like that.

But I do think it is a completely valid question to ask whether earlier neurodivergent-informed understanding could have reduced:

suffering,

shame,

self-destruction,

trauma escalation,

relationship breakdown,

burnout,

addiction vulnerability,

offending,

and the number of people spending decades believing moral failure was the problem when the nervous system underneath it had never even been recognised.

Because honestly, what happens to a human being when neurological distress gets repeatedly interpreted as behavioural failure for 20, 30 or 40 years?

And I think the long-term human cost of that may be far bigger than we are currently willing to admit.

@David Collins

I’m sorry I fell down that rabbit hole as I presumed

2 comments

The Marshmallow Test, ADHD, and the Human Cost of Misunderstood Nervous Systems