The ACE test (Adverse Childhood Experiences) is a short, ten-question screening that asks about difficult experiences before the age of 18: abuse, neglect, and household dysfunction. It comes from a landmark 1998 study by the CDC and Kaiser Permanente, which found a simple but powerful pattern: the more adversity a child faces, the higher their statistical risk of health problems decades later.
What the ACE test measures
Your ACE score is the number of categories you experienced, from 0 to 10. They fall into three groups:
- Abuse - emotional, physical, or sexual.
- Neglect - emotional or physical.
- Household dysfunction - a parent with mental illness or substance use, incarceration, domestic violence, or parental separation.
What your ACE score means
A higher score signals higher statistical risk, not a verdict. Research links scores of 4 or more to greater rates of depression, anxiety, heart disease and other conditions. But these are population averages - they describe groups, not your individual future. Many people with high ACE scores live healthy, connected lives.
How early adversity reaches the adult brain
The mechanism is chronic stress. Early adversity keeps the body's stress and arousal systems switched on, and over years that can leave a lasting imprint on how the brain is wired, particularly the regions tied to arousal, attention and emotion. Recent brain-imaging research even suggests that socioeconomic stressors in childhood shape brain organization more than almost any other single factor. We break that study down in how socioeconomic status shapes a child's brain.
Your score is not your future
The most important finding in ACE research is resilience. One stable, caring relationship, good sleep, therapy, movement and community can buffer and even reverse much of the risk. Knowing your score is useful precisely because it points to what to protect and what to repair.
Check your ACE score
Our free ACE test takes two minutes and shows your score privately. It is educational, not a diagnosis. If childhood adversity still weighs on you today, see also our guide to complex PTSD signs.
Sources: Felitti et al. (1998), Adverse Childhood Experiences Study, American Journal of Preventive Medicine. | CDC-Kaiser Permanente. Educational only - not a diagnosis.