SEND: Rethinking the Spectrum of Neurodiversity

Rethinking the Spectrum of Neurodiversity

When a Helpful Idea Starts to Limit Understanding

The concept of neurodiversity as a “spectrum” moved us away from rigid categories and toward a more inclusive understanding of human cognition. Instead of dividing people into “normal” and “disordered,” the spectrum suggested variation—fluidity—range. It was meant to humanise, to broaden, and to challenge stigma.

A growing body of research and lived experience suggests something more complicated. What was designed to expand understanding may now, in some cases, be limiting it.

The problem is not the intention behind the spectrum. It’s how the concept functions in practice.

But as the concept has evolved, an important question has emerged: what happens when the very tool designed to expand understanding begins to limit it?

The illusion of a single line

The word “spectrum” implies a line—something with two ends and a gradient in between. In everyday language, this often gets translated into a sliding scale from “mild” to “severe.”

But neurodivergence does not operate along a single axis.

An individual might be highly verbal yet experience overwhelming sensory sensitivities. Another might require significant daily support but demonstrate exceptional pattern recognition or memory. These are not points on a line—they are entirely different profiles.

Reducing this complexity to a linear spectrum risks flattening the very diversity the concept was meant to highlight.

When inclusion blurs distinction

One of the strengths of the spectrum model is its inclusivity. However, that same inclusivity can create ambiguity.

As the boundaries of the spectrum expand, the definition becomes less precise. Traits that exist across the general population—such as social discomfort, routine preference, or sensory sensitivity—can begin to blur with clinically significant conditions. This can lead to a kind of conceptual stretching, where the term risks losing clarity.

If everyone can be placed somewhere on the spectrum, it becomes harder to identify who requires specific support, intervention, or accommodation—and why.

Creating Practical Challenges in Diagnosis and Support

Perhaps the most significant practical challenge is how the spectrum groups together individuals with vastly different support needs.

Under a single diagnostic umbrella, some people live independently, while others require lifelong, high-level care. While shared identity can be empowering, shared labels can also obscure critical differences.

In education, healthcare, and policy, this can create mismatches between services and needs. A one-size-fits-all understanding of the spectrum does not translate well into real-world support systems, which depend on nuance, specificity, and clarity.

Reinforcing Misunderstandings in Public Perception

In everyday conversation, the idea of a spectrum is often simplified even further. It is frequently interpreted as a sliding scale from “less” to “more,” or reduced to the phrase, “everyone is a little bit on the spectrum.”

While this may be intended to promote empathy, it can have the opposite effect. It risks equating lived experiences of disability with common personality traits, diluting the reality of those who face significant challenges.

At the same time, it can lead to gatekeeping—where individuals are told they are “not enough” of something to belong, or “too much” to be understood.

Tensions Around Representation

The concept of spectrum also shapes which voices are heard. Those who are more able to communicate their experiences—often individuals with lower support needs—tend to dominate public narratives.

As a result, the diversity within neurodivergent communities is not always fully represented. The experiences of individuals with higher support needs can be overlooked, creating an incomplete picture of what neurodivergence actually entails.

A model designed to include everyone can, paradoxically, contribute to new forms of exclusion.

Rethinking the Framework

None of this means the concept of the spectrum is entirely without value. It played an important role in shifting perspectives and challenging outdated ideas. But it may no longer be sufficient on its own.

Increasingly, researchers and practitioners are exploring alternatives:

• Multi-dimensional models that map different traits separately

• Profile-based approaches that reflect individual combinations of strengths and challenges

• Support-focused frameworks that prioritise needs over labels

These approaches move away from the idea of a single continuum and toward a more understanding of human difference.

A More Honest Conversation about labels and the definition of a spectrum

If the goal of the spectrum was to expand understanding, then the next step is to refine that understanding—not to abandon it, but to question its limits.

The challenge now is not simply to ask where someone falls on a spectrum, but to ask a more meaningful question:

What does this person need, and how can we better understand their unique way of being in the world?