​Everyone's brain operates differently.  For the average individual, brain functions, behaviors, and processing are expected to meet the milestones set by society for developmental growth. For those who veer either slightly, or significantly, outside of these parameters, their brain functions could be classified as neurodivergent.

Neurodivergence is a non-medical term that describes people whose brains process information differently from what is considered typical. Examples of neurodivergence can include ADHD, dyslexia, and autism. 

In the play The Curious Incident of the Dog in the Night-Time, Chris is most likely on the autism spectrum. They call it a spectrum because autism takes such a huge myriad of forms. No one brain is like another and no two neurodivergent people are the same. While they might need more kindness and compassion, don't assume they are incapable or unintelligent. Be an ally and let them know you are there for them and their families.