9. Must be clinically stable – defined by the absence of prominent delusions, hallucinations, disorganized speech, or grossly disorganized or catatonic behavior. However, there must also be continuing evidence of impairment, as indicated by the presence of negative symptoms or two or more symptoms of schizophrenia listed in Criterion A of the DSM-IV, in attenuated form (e.g., odd beliefs, unusual perceptual experiences).