Schizophrenia. Description and Etiology. Symptoms of Schizophrenia. Positive Symptoms Pathological additions to normal behavior (ie. hallucinations, delusions). Negative Symptoms Characteristics that are lacking or are reduced (ie. reduced range of emotion, reduced amount of speech).
Description and Etiology
Perceptions in any sensory modality without relevant or adequate stimuli
A. Characteristic Symptoms. Two (or more) of the following, each
present for a significant portion of time during a 1-month period (or less if successfully treated):
3) disorganized speech (e.g., frequent derailment or incoherence)
4) grossly disorganized or catatonic behavior
5) negative symptoms (affective flattening, alogia, avolition)
B. Social/occupational dysfunction. One or more major areas of
functioning such as work, interpersonal relations, or self-care
are markedly below the level achieved prior to the onset.
C. Duration. Continuous signs of the disturbance persist for at least 6 months.
Do these act independently or interact with a genetic vulnerability (i.e., do genetics increase response to brain damage)?
Contemporary Family Studies
Meta-analytic effect size r=0.31.
HOW IMPORTANT ARE THESE FINDINGS?
Negative symptoms were more
frequently criticized than
Hi-EE relatives criticized negative
Sxs more than Lo-EE relatives
(Weisman et al., 1998)