“Somewhere between 500,000 and two million people—exact numbers are hard to come by—use American Sign Language (ASL) in the United States and Canada, and sign language research is an active area of investigation for psychologists and neuroscientists hoping to learn more about the underpinnings of language in the brain. Learners and researchers of any language benefit from linguistic resources that delve deep into its formal and syntactic features, but such a resource for ASL has never existed—until now. “
