"Witnesses with an intellectual disability", a witness in a proceeding whom the presiding justice has found after hearing, as provided in paragraph (1) of subsection (b), to have an intellectual disability.
"Intellectual disability", substantial limitations in present functioning manifesting before age eighteen and characterized by significantly subaverage intellectual functioning, existing concurrently with related limitations in two or more of the following applicable skill areas: communication, self-care, home living, social skills, community use, self-direction, health and safety, functional academics, leisure and work.
Mass. Gen. Laws ch. 233, § 23E