title: Methodological and interpretive constraints resulting from the use of the Per-Mag classification in high-risk information-processing research.
abstract: It has previously been argued that the current Per-Mag classification criteria may erroneously select some individuals who are not vulnerable to psychosis. We suggest that a second false-positive problem exists with these criteria. Specifically, actively psychotic individuals may be included in presumably prepsychotic samples. Implications of this problem for at-risk information-processing research are discussed.
mesh_terms: D006801:Humans; D010555:Personality Inventory; D011581:Psychological Tests; D011594:Psychometrics; D011618:Psychotic Disorders / Q000145:classification / Q000175:diagnosis* / Q000523:psychology; D012107:Research Design / Q000592:standards; D012306:Risk; D012559:Schizophrenia / Q000145:classification / Q000175:diagnosis; D012565:Schizophrenic Psychology; D012569:Schizotypal Personality Disorder / Q000145:classification / Q000175:diagnosis / Q000523:psychology