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.