A condition exhibiting one or more of the following characteristics over a long period of time and to a marked degree that adversely affects a child’s
educational performance:
(A) An inability to learn that cannot be explained by intellectual,
sensory, or health factors.
(B) An inability to build or maintain satisfactory interpersonal
relationships with peers and teachers.
(C) Inappropriate types of behavior or feelings under normal
circumstances.
(D) A general pervasive mood of unhappiness or depression.
(E) A tendency to develop physical symptoms or fears associated with
personal or school problems.”

As defined by IDEA, emotional disturbance includes schizophrenia but does not apply to children who are socially maladjusted, unless it is determined that they have an emotional disturbance.

Special Education Categories and Accommodations under the Individuals with Disabilities Educati...