What a New Study Reveals About Neurodivergence and Childhood Trauma

A new peer-reviewed study published in BMC Medicine surveyed 5,395 adults in England and found something that stopped me in my tracks, even after 16 years of sitting with clients with some form of neurodivergence carry the weight of early childhood pain. People who are neurodivergent are significantly, measurably, and disproportionately more likely to have adverse childhood experiences (ACEs). And when those two things combine, the harm compounds in ways that go beyond what either factor would predict on its own.

Just as a reminder, there are many types of neurodivergence, but this study and my private therapeutic practice mainly works with those with Obsessive Compulsive Disorder (OCD), Attention Deficit Hyperactivity Disorder (ADHD) and Autism Spectrum Disorder (ASD).

This is not surprising to those of us working in this space, a very, very small number of people. But it is still life-shifting to have it documented in a large, representative population sample of over 5,000 people.

Researchers examined the relationship between neurodivergence status and nine different types of ACEs, including physical, verbal, and sexual abuse, parental separation, witnessing domestic violence, and living with household members who struggled with mental illness, addiction, or incarceration. Then they looked at how the combination of being neurodivergent and having experienced multiple ACEs affected four outcomes in adulthood: poor general health, low mental wellbeing, arrest, and incarceration.

The findings are striking. Every single type of adverse childhood experience, or ACE was more prevalent in individuals with a neurodivergent diagnosis than in neurotypical peers. Verbal abuse was the most commonly reported ACE among respondents who were neurodivergent, affecting nearly 45% of them. Three in ten individuals who were neurodivergent reported four or more ACEs, compared to only one in ten neurotypical individuals. After controlling for age, sex, ethnicity, and socioeconomic deprivation, individuals who were neurodivergent were nearly five times more likely to have experienced four or more ACEs than their neurotypical peers.

Even more dramatically, those with a neurodivergent diagnosis were 2.34 times more likely to experience low mental wellbeing and 2.37 times more likely to have ever been arrested compared to neurotypical peers, independent of their ACE history entirely.

What makes this study especially important is what happens when you combine neurodivergence with high ACE counts.

As a trauma therapist who works primarily with adults who are neurodivergent, none of this surprises me. What it does is confirm something I have been saying in treatment rooms for years. People who are neurodivergent often move through the world carrying stressors that neurotypical people simply do not register. Sensory overwhelm, social misattunement, communication differences, the exhaustion of masking. These are not character flaws. They are constant, low-grade nervous system activations that build up over time.

When you layer childhood trauma on top of a nervous system that is already working harder just to navigate daily life, the compounding effect on mental health, behavior, and life outcomes is profound. The stress physiology here is not metaphorical. It is biological. And it has real consequences for how people show up in relationships, in workplaces, and yes, in encounters with police and criminal justice systems.

Services are not currently meeting the needs of people who are neurodivergent, particularly those who have also experienced significant trauma. Long wait times, inaccessible environments, diagnostic overshadowing, and practitioners who lack the tools to understand how neurodivergence and trauma intersect. These are not minor gaps.

Trauma-informed training that does not specifically address neurodivergence will not be enough. The data tells us that clearly now.