Psychology

The Sensory Layer

How your environment shapes your capacity to think — and what to do about it

Learning Objectives

By the end of this module you will be able to:

  • Describe sensory processing differences in ADHD and autism, including both hypersensitivity and hyposensitivity patterns.
  • Explain why open-plan offices and high-interruption environments disproportionately affect neurodivergent engineers.
  • Distinguish physical sensory load from digital notification load and identify how they compound each other.
  • Evaluate remote work as an accommodation — including its real benefits and its genuine limits.
  • Design or advocate for a workspace configuration (zoning, interruption reduction, physical accommodations) that fits a specific sensory profile.

Core Concepts

What "sensory processing differences" actually means

The term gets used loosely, so it helps to be precise. Sensory processing differences refer to atypical responsivity to sensory input — meaning a person's nervous system does not filter, weight, or respond to sensory information the way a neurotypical nervous system does. This can manifest as hypersensitivity (a stronger-than-expected reaction to stimuli), hyposensitivity (a weaker-than-expected reaction), or both — sometimes across different modalities in the same person.

According to research on sensory processing in autism and ADHD, these differences span auditory, visual, tactile, proprioceptive, olfactory, and vestibular modalities. They are not metaphors for "being sensitive" — they reflect measurable differences in how sensory signals are processed and regulated.

Hyper vs. Hypo

Hypersensitivity: a fluorescent light feels physically painful. Hyposensitivity: you need background noise to focus, or can't feel when you're getting cold. Both are real. Both can coexist in the same person across different senses.

ADHD and autism have distinct sensory profiles

It matters that ADHD and autism are not the same condition, and their sensory profiles differ in ways that affect what accommodations actually help.

Research comparing sensory processing patterns across autism and ADHD shows that children with ADHD demonstrate elevated visual sensory processing sensitivity — higher even than autistic children on that specific measure — while autistic individuals experience greater difficulty with touch (tactile) processing. Proprioceptive difficulties (sense of body position) appear more characteristic of ADHD than autism.

Accommodations must be tailored to the specific sensory profile, not applied generically because someone has a neurodivergence label.

This distinction matters when you're asking for changes to your environment, or when you're helping design a team's working norms. Blanket "neurodiversity accommodations" frequently miss the mark because they flatten these differences.

Sensory load compounds cognitive load

Engineering work is already cognitively demanding — holding system context in working memory, debugging across abstraction layers, tracking dependencies. Sensory overload does not just feel unpleasant; it actively degrades the cognitive capacity available for that work.

An integrative review of sensory processing in academic settings documents how atypical sensory responsivity — across auditory, visual, proprioceptive, and tactile channels — negatively influences sustained attention and access to complex material. The environment is not background noise; it is an active tax on working memory.

Worked Example

The open-plan office as a sensory stress test

Consider an engineer with ADHD joining a team in an open-plan office. The physical environment includes: overhead fluorescent lighting, continuous low-level noise from adjacent conversations, movement in peripheral vision as colleagues walk past, and no physical boundary between their desk and the rest of the floor.

At the same time, their digital environment runs continuously: Slack notifications, GitHub PR alerts, email, a project management tool pinging on ticket updates, and an IDE with multiple animated status indicators.

Neither of these layers is catastrophic on its own. Together, they stack.

EEG research on open-plan offices shows that brain activity associated with concentrated effort increases steadily over time as workers attempt to filter environmental distractions. Physiological stress indicators rise by around 34%. Negative mood increases by approximately 25%. These are population-level effects — for someone whose nervous system filters sensory input less automatically, the baseline cost is higher and the fatigue accumulates faster.

The filtering gap

Neurotypical workers can often filter ambient noise and visual movement without conscious effort. Neurodivergent individuals frequently cannot. The energy spent filtering is energy not available for engineering work.

Now layer in the digital environment. Research on digital notification load in software engineering contexts shows that project management and chat tools send excessive notifications by default, and that animated, flashing, or constantly-updating elements in interfaces constitute visual noise that neurodivergent users — particularly those with autism or sensory processing differences — cannot easily filter. The cognitive cost of this accumulates alongside physical sensory load.

The result is not "distraction." It is cumulative depletion. By mid-afternoon, the engineer in this scenario may have spent most of their cognitive capacity managing an environment rather than writing software.

Key Principles

1. Agency over accommodation

The most important design principle across all sensory environment research is this: user control outperforms imposed solutions.

Research on multi-sensory environment use with autistic individuals demonstrates that when individuals can control the intensity, duration, and frequency of sensory stimuli themselves, outcomes include increased attention, reduced repetitive or defensive behaviors, and improved sensory regulation. The same study found reductions in stereotyped speech, activity level dysregulation, and aggressive behaviors when control was granted.

This is not merely about preference. It reflects a functional mechanism: when you cannot predict or control sensory input, your nervous system remains on alert. Agency over your environment allows regulation to happen.

Practically, this means: when you are asking for changes to your workspace, the goal is not to negotiate a specific fixed solution — it is to negotiate control. A dimmer switch is better than a specific light level. Notification settings you can adjust are better than a policy that mutes everything.

2. Physical and digital load are the same problem

It is tempting to treat workspace design and software configuration as separate concerns. They are not. Both are sensory input channels, and they add.

Research on sensory load in digital environments identifies autoplay videos, animated backgrounds, multiple moving elements, bright flashing components, and constant notification badges as sources of visual noise that neurodivergent users cannot readily filter. Visual complexity in interfaces — excessive colors, dense layouts, unpredictable patterns — creates the same kind of sensory dysregulation that physical office noise does.

Managing your sensory environment means auditing both layers.

3. Interruptions are a sensory event

Interruptions are typically framed as a productivity issue. They are also sensory ones.

Research on ADHD engineers and interruption patterns shows that engineers with ADHD experience "attention crash" moments particularly during unstructured work periods and transitions between tasks. The problem is not just context switching — it is that each interruption resets the nervous system's regulatory state, requiring energy to return to focus. Engineers with ADHD report more interruptions from waiting for answers and more difficulty with task transitions than their neurotypical counterparts.

Protected focus time is not a productivity preference. It is a sensory accommodation.

4. Zoning gives everyone choice; isolation gives some people a workaround

When offices are designed with sensory zoning — high-stimulation areas for collaboration, medium-stimulation areas for routine work, low-stimulation areas for deep focus and sensory regulation — they create conditions where neurodivergent engineers can self-regulate without needing to formally request accommodations.

The Sensible Workplace framework proposes arranging spaces along a low–medium–high stimulation continuum, with restorative spaces available as needed. The critical point from this research: neuroinclusive office design does not require isolating neurodivergent people. It requires giving everyone control and choice over their sensory context. Isolation as the only option is not inclusion — it is workaround design.

5. Remote work is powerful but not complete

Research on remote and hybrid work for neurodivergent professionals is clear: autonomy over lighting, temperature, noise, and physical arrangement produces measurable productivity gains. Some research cites productivity increases of up to 50% for autistic employees working remotely compared to office settings. Remote work also reduces burnout by eliminating forced social interaction and commute costs.

But remote work is not a complete solution. Research on neurodivergent professionals working from home shows that they face the additional challenge of constructing their own accessible physical and digital environments, often without organizational support, while also managing the tension between productivity and wellbeing without the social scaffolding an office can provide. Remote work transfers the burden of environment design from the organization to the individual.

Active Exercise

Sensory audit: mapping your environment

This exercise takes approximately 20–30 minutes and produces something actionable: a map of where your sensory load comes from, which layer it comes from, and what you actually control.

Step 1 — Physical layer inventory

List the sensory inputs present in your primary workspace. For each, note: the modality (auditory, visual, tactile, olfactory), whether it is constant or intermittent, whether you find it amplifying or neutral, and whether you currently have any control over it.

Common candidates: lighting type and intensity, ambient noise (conversation, HVAC, street), temperature, seating and physical feedback, smells (food, cleaning products, people).

Step 2 — Digital layer inventory

List the notification sources active during a typical working day. For each tool or channel, note: how frequently it generates alerts, what form the alert takes (sound, visual badge, popup, animation), and whether you have customized its settings.

Common candidates: Slack or Teams, email, GitHub or GitLab, Jira or Linear, the IDE itself, calendar invites, browser tabs.

Step 3 — Identify the highest-cost inputs

Look across both inventories. Which three inputs currently cost the most — either because they are frequent, because you find them dysregulating, or because you have no control over them?

Step 4 — For each high-cost input, identify one concrete change

The change does not need to be large. The question is: what is within your control right now? What would require negotiation with your employer or team? For anything requiring negotiation, write one sentence describing why this matters in terms of cognitive capacity — not comfort — and what you are asking for specifically.

On advocating for changes

Framing sensory accommodations in terms of cognitive capacity and engineering output tends to be more effective than framing them in terms of comfort or diagnosis. Both framings are legitimate — but the former is often less vulnerable to dismissal.

Key Takeaways

  1. Sensory processing differences are specific, not generic. ADHD and autism involve distinct sensory patterns — visual sensitivity is elevated in ADHD, tactile difficulty is more characteristic of autism — and accommodations need to match the actual profile, not a general neurodivergence label.
  2. Physical and digital sensory load add up. Open-plan offices impose measurable cognitive costs through environmental filtering demands. Digital notification environments impose the same kind of cost through a different channel. Managing your sensory environment means auditing both.
  3. Agency is the mechanism, not just a preference. Research consistently shows that the ability to control sensory input — adjusting intensity, timing, and type — produces better outcomes than imposed fixed accommodations. When advocating for changes, advocate for control.
  4. Remote work transfers environmental control to you, but also transfers the design burden. It is genuinely beneficial for many neurodivergent engineers, but it is not a complete solution, and it should not become an excuse for organizations to avoid designing inclusive physical spaces.
  5. Interruptions are a sensory event, not just a productivity problem. Protected focus time, asynchronous communication defaults, and clear do not disturb norms reduce the neurological cost of environment management — not just the time cost of context switching.

Further Exploration