810 Highlights of Changes From DSM-IV to DSM-5
The following motor disorders  are included in DSM-5: deve lopmental coordination disor-
der, stereotypic movement disorder, Tourette’s disorder, persistent (chronic) motor or vocal
tic disorder, provisional tic disorder, other spec ified tic disorder, and un specified tic disorder.
The tic criteria have been standardized across all of these disorders in this chapter.
Schizophrenia Spectrum and Other Psychotic Disorders
Two changes were made to Criterion A for schizophrenia:  1) the elimination of the special at-
tribution of bizarre delusions and Schneiderian fi rst-rank auditory hallucinations (e.g., two or
more voices conversing), leadin g to the requirement of at least two Criterion A symptoms for
any diagnosis of schizophrenia, and 2) the addition  of the requirement that at least one of the
Criterion A symptoms must be delusions, hallu cinations, or disorganized speech. The DSM-IV
subtypes of schizophrenia were eliminated due to their limited diagnostic stability, low reli-
ability, and poor validity. Instead, a dimensional approach to rating severity for the core symp-
toms of schizophrenia is includ ed in DSM-5 Section III to capt ure the important heterogeneity
in symptom type and severity  expressed across individual s with psychotic disorders.
Schizoaffective disorder  is reconceptualized as a longitudin al instead of a cross-sectional di-
agnosis—more comparable to schizophrenia, bipolar disorder, and majo r depressive disorder,
which are bridged by this condition—and requires  that a major mood episode be present for a
majority of the total disorder ’s duration after Criterion A has been met. Criterion A for delu-
sional disorder no longer has the requirement that th e delusions must be nonbizarre; a spec-