You're staring at your laptop. The thing you need to do is right there. You've been staring for forty minutes. Your body won't move toward it. Is this ADHD? Is this PDA? Is this both? The experience from the inside is almost identical. The mechanisms are not. And the strategies that help one can make the other worse.
This comes up constantly in clinical work. An adult shows up with an ADHD diagnosis that explains some of what they experience but not all of it. The medication helps with focus but doesn't touch the paralysis. The body doubling works sometimes and backfires other times. The planner system lasted four days. Something else is running alongside the ADHD, or instead of it, and nobody has named it yet.
ADHD executive dysfunction is primarily a dopamine and attention problem. The system can't prioritize, can't sustain focus on things that aren't novel or urgent, can't sequence steps in the right order. The task is boring, or it's not urgent enough, or the system literally cannot hold it in working memory long enough to act on it. The task itself isn't threatening. It's just not generating enough signal for the brain to engage with it.
PDA demand sensitivity is a threat-response problem. The task isn't boring. It's coded as dangerous. The nervous system reads the demand, any demand, as something being required of you, and it responds with the same fight-flight-freeze cascade it uses for physical threats. The prefrontal cortex goes offline. The survival brain takes over. You don't lose focus. You lose access to voluntary action.
From the outside, both look like "not doing the thing." From the inside, the feeling is different if you know what to look for.
ADHD paralysis tends to track with interest and novelty. You can't do the boring report, but you can spend five hours on something you're interested in. The issue is engagement. If someone makes the boring task more interesting, or if the deadline creates enough urgency, you can suddenly do it. ADHD responds to stimulation.
Demand-driven paralysis tracks with obligation. You might be interested in the task. You might want the outcome. But the moment it becomes something you have to do, something shifts. The commitment, the deadline, the expectation from another person, even your own expectation of yourself, turns it into a demand. And demands activate the threat response. The more important it is, the more your nervous system locks you out.
Here's a test that isn't clinical but is useful: Think about something you wanted to do, planned to do, and then couldn't do once you committed to it. Not because it was boring. Not because something more interesting came along. Because the act of committing to it changed how it felt in your body. If that's a pattern, you're probably looking at demand sensitivity, not just executive dysfunction.
ADHD asks: is this interesting enough to engage with? Demand sensitivity asks: is this safe enough to move toward? Same stuckness. Different question underneath.
Standard ADHD strategies add structure: accountability partners, body doubling, timers, habit trackers, commitment devices. These work for ADHD because they create external pressure that compensates for the internal signal deficit. Your brain can't generate enough urgency on its own, so you borrow it from the environment.
For a demand-sensitive nervous system, every one of those strategies is another demand. The accountability partner becomes someone you have to answer to. The timer becomes a countdown on your autonomy. The habit tracker becomes a record of failure. The commitment device becomes a cage. You add structure, and the threat response escalates, and then you conclude that you can't even do the strategies that are supposed to help, which is a particularly efficient shame spiral.
This is why some people with an ADHD diagnosis feel like the standard advice makes them worse. It's not that the advice is wrong. It's that it's being applied to the wrong mechanism. Structure helps executive dysfunction. Structure can worsen demand sensitivity. If your clinician is treating ADHD and you're not getting better, it's worth asking whether demand sensitivity is running alongside it or instead of it.
Many people have both. ADHD and autism co-occur frequently, and demand sensitivity lives in that overlap. When both are running, the experience is a particular kind of chaos: you can't do boring things because of the ADHD, you can't do obligatory things because of the demand sensitivity, and the remaining window of things you can do, things that are interesting and not framed as demands, is narrow. This is why some adults describe their functional capacity as wildly inconsistent. It's not inconsistent. It's two different filters, both running, both narrowing what gets through.
The clinical term for this overlap is AuDHD, and it's increasingly recognized. If you're carrying an ADHD diagnosis and the standard interventions only help part of your experience, this overlap is worth exploring with a clinician who understands both profiles.
The short version: lower the demand character of the task instead of adding more structure around it. That means reducing the sense of obligation, not the task itself. Removing "should" from the framing. Removing timelines when timelines aren't necessary. Offering yourself genuine choice about when, how, or whether to do the thing, not fake choice where you're going to do it anyway and you know it.
This feels wrong to most people. It feels like giving up. Like lowering the bar. Like if you stop pressuring yourself, nothing will ever get done. But the pressure is what's activating the threat response, and the threat response is what's preventing the action. Removing the pressure doesn't mean removing the task. It means removing the thing that's blocking you from doing it.
This is a clinical framework issue, not a self-help tip. The RELATE framework addresses demand sensitivity at the nervous-system level. You Were Never Broken translates the framework for self-directed use. If you want to go deeper into the mechanisms, those are the places to start. If you want clinical support, look for someone who understands both ADHD and PDA and can help you sort which engine is driving which behavior in your specific case.