Features of positive schizophrenia:
(1) hallucinations (auditory, haptic or olfactory)
(2) delusions (persecutory, jealous, somatic, religious, grandiose, fantastic)
(3) positive formal thought disorder (marked incoherence, derailment, tangentiality, illogicality)
(4) repeated instances of bizarre or disorganized behavior
Features of negative schizophrenia:
(1) alogia (marked poverty of speech, poverty of speech content)
(2) flattened affect
(3) anhedonia-asociality (inability to experience pleasure or to feel intimacy; few social contacts)
(4) avolition-apathy (anergia, impersistence at work or school)
(5) attentional impairment
Each of these is graded on a 0 to 5 Likert-type scale, based on factors such as persistence, frequency and effect on lifestyle. A finding >= 4 considered prominent/marked.
|
Type of Schizophrenia
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Positive Features
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Negative Features
|
|
positive
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>= 1 marked
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none marked
|
|
negative
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none marked
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>= 2 marked
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If the person does not fulfill the criteria for either positive or negative schizophrenia, then the person is classified as mixed.
