One fifteen in the afternoon. The same constructed scene from the previous reading: the same person, the same comment, the same response.
In the previous reading — Regulatory Margin in the Environment — the question opened in several directions: what was particular about the comment, what she would say about that moment, and what the day had been requiring. What recovery opportunities and conditions were there? What had the environment been asking since the morning?
Now the question changes. If those conditions could have played a part in how she arrives at this moment, what does it mean to ask how much margin may remain available when a new demand arrives? We do not know her organization at 9:00 or at 1:15. What we could compare is what she did at different moments; margin is the question the framework proposes for thinking about that difference.
The framework does not change. Neither does the moment. What changes is the movement of observation: we are no longer looking at the environment. We are using a construct to ask about the system's organization within that environment.
Regulatory margin is not a quantity that is measured. It is a construct for organizing questions about what may remain available.
It describes the range within which activation can rise without exceeding what the system can sustain under current conditions — a range that may be related to what the system has been carrying and to the recovery opportunities and conditions there have been. It is not directly observable. It is not a fixed property of a person.
What can be observed is what the person does and how they participate under different conditions and at different moments of the same cycle. That something does not happen does not, by itself, show that it cannot happen. Margin is the construct the framework proposes for organizing that observation — for asking how much room may remain available when a demand arrives, and how that room may change across time.
What follows describes how the framework uses the construct of margin to organize observation — not how a directly verifiable physiological mechanism works. Margin is neither measured nor observed directly. The framework uses it as a construct for organizing questions based on patterns observable across time.
What may remain available at a given moment may be related to how recovery from the previous cycle went — from the previous day, from the night, from what was being carried before this situation began. The framework proposes that the operating baseline may vary, even though that variation is not directly observable.
Each demand — sensory, relational, cognitive, predictive — may play a part in changing how much margin may remain available for later demands. The framework proposes that margin may be related to what the system has been carrying, and that conditions can support or limit recovery between demands.
When something that was available stops being available, the framework proposes distinguishing between a change in capacity and a change in access under present conditions. The same skill, the same knowledge, and the same person can show different results at different moments. That variability does not, by itself, demonstrate a loss of capacity. Nor does it, by itself, demonstrate a change in margin. The construct of margin makes it possible to ask whether what was available for sustaining an additional demand may have changed.
When access to communication, learning, or participation changes, the framework proposes using margin as a construct for asking what may have played a part in that change. What the observer can see is a change in what the person does or in how they participate. Reading it as a change in access is already an interpretation; margin is the question that organizes that reading, not its directly verifiable cause.
The numbers indicate one possible order for asking, not demonstrated causes. Each step is a question the framework proposes.
| Ask | Also ask |
|---|---|
| What was particular about that comment for her? | What did the morning require — and how much margin may have remained available when that comment arrived? |
This shift widens what is considered. If the comment was hurtful, that needs attention in its own right. And if the reading of the moment suggests that what was available for sustaining a new demand may have changed, addressing the comment in isolation may not be enough: it may also help to examine what the whole cycle has required and what conditions might support recovery before the next demand arrives, drawing on whatever she may be able to say about that moment.
And this also requires a different reading of the environment: not only of the event that became visible, but of what conditions have been asking of her over time.
Think of a moment when, after a demand that seemed small to you, someone's response surprised you with its intensity. What had the previous hours required? What recovery opportunities and conditions were there? What might that demand have meant for that person?
In the settings where you work, is the same demand presented at the same time of day for everyone? What would it mean to consider that each person may arrive at that moment with a different margin?
What does it mean, in your context, to care for the conditions in which the person has to sustain what the day asks of them? Not as an automatic response to a behavior that has already occurred, but as an adjustment of conditions over the course of the day, one that takes into account what the person themselves communicates.
If margin is not directly observable, what can be observed that would allow you to use the construct to ask better questions?
How does your reading of a situation change when you ask yourself not only what happened, but how much margin may have remained available when it happened?
The observations in this guide connect with several active areas of research. These traditions did not originate the framework — the framework emerged through clinical observation. They are included here because they offer relevant conceptual context and because they raise questions close to those of the framework. That thematic closeness does not constitute evidence for the framework's specific proposals: their presence does not imply that the framework derives directly from them, that the framework adopts the strongest claims of those traditions, or that they confirm the mechanisms the framework proposes.
Allostatic Load
Allostasis describes how the organism maintains stability through change, anticipating demand as well as responding to it (Sterling, 2012). Research on allostasis and allostatic load studies how repeated or prolonged activation of physiological systems may be related to cumulative costs for the organism (McEwen, 1998). This research provides relevant scientific context, but it does not demonstrate that a person's regulatory margin has narrowed during a school day, nor does it allow that to be inferred from an observed response. The framework proposes exploring that possible relationship without equating the two concepts.
Sensory Processing and Neurological Thresholds
Sensory processing models describe individual differences in responses to sensory information. Dunn's model (1997) proposes neurological thresholds — the amount of stimulus the nervous system needs in order to notice it or react to it — which the model relates to experience and genetic factors, and which may vary from one day to another, depending on the person's state and the task. This area offers conceptual context related to the idea that the response to a sensory demand may not be fixed, although the more specific claims about threshold mechanisms remain under active investigation.
Intraindividual Performance Variability
Research on intraindividual variability studies, among other things, how the reaction times of a single person vary across the trials of a task. A review with meta-analysis examined that variability in autistic samples: the increase relative to comparison groups appeared in the analyses that included participants with comorbid ADHD; when they were excluded, the increase was not statistically significant (Karalunas et al., 2014). These results do not establish that a person experiences changes in regulatory margin over the course of the day, or that accumulated conditions explain their responses. Those relationships remain questions for the framework.
Why Zebras Don't Get Ulcers (3rd ed.)
Robert Sapolsky — Holt, 2004
Living Sensationally: Understanding Your Senses
Winnie Dunn — Jessica Kingsley, 2008
Reading the Nervous System: A Physiological Reading of Autistic Experience
María E. Reyes — Neurodiversidad Consciente, 2026