In this chapter:
(1) "Adaptive behavior" and "intellectual disability" have the meanings assigned by Section 591.003, Health and Safety Code.
(2) "Child with an intellectual disability" means a child determined by a physician or psychologist licensed in this state to have subaverage general intellectual functioning with deficits in adaptive behavior.
(3) "Child with mental illness" means a child determined by a physician or psychologist licensed in this state to have a mental illness.
(4) "Interdisciplinary team" means a group of intellectual disability professionals and paraprofessionals who assess the treatment, training, and habilitation needs of a person with an intellectual disability and make recommendations for services for that person.
(5) "Least restrictive appropriate setting" means the treatment or service setting closest to the child's home that provides the child with the greatest probability of improvement and is no more restrictive of the child's physical or social liberties than is necessary to provide the child with the most effective treatment or services and to protect adequately against any danger the child poses to self or others.
(6) "Mental illness" has the meaning assigned by Section 571.003, Health and Safety Code.
(7) "Restoration classes" means curriculum-based educational sessions a child attends to assist in restoring the child's fitness to proceed, including the child's capacity to understand the proceedings in juvenile court and to assist in the child's own defense.
(8) "Subaverage general intellectual functioning" means intelligence that is measured on standardized psychometric instruments of two or more standard deviations below the age-group mean for the instruments used.