Martha's Vineyard famously developed one of these systems for communication.
Nancy Frishberg argued that these constructs reject the Steady State theory since they have become less iconic and more arbitrary over time. The tabula, designator, and signation were combined into cheremes to describe and represent these constructs by William Stokoe, an advocate for their legitimacy. One of these structures was spontaneously developed at a Nicaraguan school, while another was created by Charles-Michel de l'Epee. Oliver Sacks discussed how (*) "movement parsing" involved in learning these constructs changes the auditory cortex and described a protest by college students using these constructs at Gallaudet University in his book Seeing Voices. Martha's Vineyard famously developed one of these systems for communication. For 10 points, name these systems of language often used by the deaf, including ASL.
Nancy Frishberg argued that these constructs reject the Steady State theory since they have become less iconic and more arbitrary over time.
sign language [or “ASL” before “Nicaraguan school”]