The word neurodiversity—a portmanteau of “neurological” and “diversity”—was first coined in the 1990s by Australian social scientist Judy Singer, who is herself on the autism spectrum. It has gained significant ground in recent years, particularly among advocacy communities. The term originally referred most commonly to autism but has since come to include ADHD, dyslexia, Tourette's, synesthesia, as well as other learning and developmental differences.