Schizoaffective Disorder 107
has to be met. Criteria B (soc ial dysfunction) and F (exclusion  of autism sp ectrum disorder
or other communication disorder of childhood onset) for schizophrenia do not have to be
met. In addition to meeting Criterion A for schizophrenia, there is a major mood episode
(major depressive or manic) (Criterion A for schizoaffective disorder). Because loss of in-
terest or pleasure is common in schizophrenia,  to meet Criterion A for schizoaffective dis-
order, the major depressive episode must in clude pervasive depressed mood (i.e., the
presence of markedly diminished interest or pleasure is not sufficie nt). Episodes of de-
pression or mania are present for the majority of  the total duration of the illness (i.e., after
Criterion A has been met) (Criterion C for schi zoaffective disorder). To separate schizoaf-
fective disorder from a depressive or bipola r disorder with psychotic features, delusions
or hallucinations must be present for at least  2 weeks in the absence of a major mood epi-
sode (depressive or manic) at some point duri ng the lifetime duration  of the illness (Cri-
terion B for schizoaffective disorder). The symptoms must not be attributable to the effects
of a substance or another medical condition (Criterion D for schi zoaffective disorder).
Criterion C for schizoaf fective disorder specifies that mood symptoms meeting criteria
for a major mood episode must be present for the majority of the total duration of the ac-
tive and residual portion of the illness. Criter ion C requires the asses sment of mood symp-
toms for the entire course of a psychotic illnes s, which differs from th e criterion in DSM-IV,