What is neurodiversity?
A simple definition of neurodiversity
Neurodiversity refers to the natural variation in the human brain, the many different ways people pay attention, learn, remember, socialize, and make sense of information. The word was popularized by Australian sociologist Judy Singer in the late 1990s, by analogy with biodiversity: just as an ecosystem is healthier for its variety, human groups think better when they contain a range of minds rather than one standardized model.
Importantly, neurodiversity is a fact about people in general, not a diagnosis. It reframes differences such as autism or ADHD not as things that are simply "wrong" and need fixing, but as natural variations that come with a mix of strengths and challenges depending on the environment. That framing, sometimes called the neurodiversity paradigm, sits alongside, not instead of, the reality that many neurodivergent people also face genuine difficulties and may need support or accommodations.
Neurodiversity vs. neurodivergent vs. neurotypical
These three terms are often mixed up, and getting them right makes everything else clearer:
- Neurodiversity is the concept: the whole range of human brains, taken together. A team, a company, or humanity is neurodiverse. An individual is not "a neurodiversity."
- Neurodivergent describes a person whose brain works differently from what is considered typical, for example, someone who is autistic, or has ADHD, dyslexia, or dyspraxia.
- Neurotypical describes a person whose thinking, learning, and processing fall within the range most people expect and that most workplaces are unintentionally designed around.
In one sentence: a person is neurodivergent or neurotypical; a group is neurodiverse.
What conditions are considered neurodivergent?
There is no single official list, and the term is deliberately broad. The profiles most commonly included are:
- ADHD (attention-deficit/hyperactivity disorder), differences in attention, impulse regulation, and energy.
- Autism, differences in communication, social interaction, sensory processing, and pattern of interests.
- Dyslexia, differences in reading and language processing, often paired with strong big-picture and spatial reasoning.
- Dyspraxia (developmental coordination disorder), differences in coordination and motor planning.
- Dyscalculia, differences in working with numbers.
- Tourette syndrome and tic disorders, and others such as differences linked to acquired brain injury.
Two things are worth knowing: these profiles frequently co-occur, so it is common to be neurodivergent in more than one way at once; and they are dimensional rather than binary, which is one reason many adults reach mid-career before they are identified, if ever.
How common is neurodiversity?
Neurodiversity is far more common than many managers assume. A widely cited 2020 review by researcher Dr. Nancy Doyle, published in the British Medical Bulletin, estimates that 15-20% of the population is neurodivergent. That is roughly one in five people, which means a team of ten very likely includes one or two neurodivergent members, whether or not anyone has said so.
Roughly 3-4% of adults are thought to have ADHD; the U.S. Centers for Disease Control and Prevention estimates more than five million American adults are autistic; and dyslexia is commonly estimated to affect somewhere between one in ten and one in five people. Because many neurodivergent adults are undiagnosed, the true figures are likely higher than diagnosis rates suggest.
Why neurodiversity matters at work
Neurodivergent people bring genuine strengths, pattern recognition, creative problem-solving, deep focus, memory, and fresh angles on old problems. When organizations create the conditions for those strengths to show up, the results are measurable:
Deloitte reports that teams including neurodivergent professionals in some roles can be up to 30% more productive than those without, and that neuroinclusive organizations are markedly more likely to see ideas move from concept to product and to report better decision-making. JPMorgan Chase found that employees hired through its Autism at Work program were 90-140% more productive than peers, with consistent, high-quality output.
The flip side is a talent gap. According to Statistics Canada's 2022 Canadian Survey on Disability, 62% of working-age adults with disabilities were employed, compared with 78% of those without, but among people with a bachelor's degree or higher, that gap narrows to just 3.1 percentage points. In other words, when access and opportunity are present, the gap nearly disappears. The barrier is rarely talent; it is workplace design, hiring processes, and everyday management that quietly screen people out.
How managers support neurodiversity
You do not need a diagnosis, a label, or a big program to manage well for neurodiversity. Most of the gain comes from a handful of everyday habits that help everyone:
- Ask, don't assume. A simple "what helps you do your best work?", and acting on the answer, beats guessing.
- Put it in writing. Confirm instructions, decisions, and expectations in text, not just out loud, so nothing rests on memory of a hallway conversation.
- Offer flexibility by default. Focus time, quiet space, noise-cancelling headphones, and flexible hours should be ordinary tools, not special favours that require disclosure.
- Design inclusive meetings. Share agendas in advance and give more than one way to contribute, in the room and in writing.
- Make support easy to request. Lower the friction so people can ask for a small adjustment without a formal process or a diagnosis.
This is the everyday work of neuroinclusion, turning the fact of neurodiversity into practical, inclusive management. It is exactly what Lasting Brain Health helps managers build. We are a Canada-based organization offering science-backed neurodiversity and manager-skills training, workshops, a structured manager program, a readiness check, manager toolkits, and e-learning, for People, HR, and L&D leaders across North America. Our approach is grounded in evidence rather than slogans; the organization was founded by a behavioural scientist with a PhD in developmental psychology. To see where your team stands, start with the free Manager Scorecard or book a discovery call.
FAQ
What is the difference between neurodiversity and neurodivergent?
Neurodiversity describes the fact that human minds naturally vary; it is a property of a group or of humanity as a whole. Neurodivergent describes an individual whose brain works differently from the neurotypical majority, such as someone who is autistic or has ADHD or dyslexia. In short, a person is neurodivergent, a team is neurodiverse.
Is neurodiversity a disability?
Neurodiversity itself is not a disability; it is simply the range of natural variation in how brains work. Some neurodivergent people identify as disabled and some do not, and both are valid. Under the social model of disability, people are often disabled less by their differences than by environments built for only one kind of mind. This is general information, not legal, medical, or clinical advice.
What conditions are considered neurodivergent?
Commonly included profiles are ADHD, autism, dyslexia, dyspraxia (developmental coordination disorder), dyscalculia, and Tourette syndrome. The term is broad and can also include acquired differences. There is no single official list, and many people are neurodivergent in more than one way at once.
How common is neurodiversity?
An estimated 15 to 20 percent of people, roughly one in five, are neurodivergent, according to a widely cited 2020 review by Nancy Doyle in the British Medical Bulletin. That means almost every team of any size already includes neurodivergent people, whether or not anyone has disclosed it.
Why does neurodiversity matter at work?
Neurodivergent people bring strengths such as pattern recognition, creativity, focus and problem-solving. Deloitte reports that teams including neurodivergent professionals can be up to 30 percent more productive than those without, and JPMorgan Chase found employees in one neurodiversity program were 90 to 140 percent more productive. When managers know how to support different thinking styles, that potential turns into performance.