The Rust Inventory of Schizotypal Cognitions (RISC).

The Rust Inventory of Schizotypal Cognitions (RISC) is a new, psychometrically constructed, short questionnaire for assessing the schizotypal cognitions associated with the positive symptoms of acute schizophrenia. It differs from previous scales in having been developed and standardized with special attention to normal distribution in the general population, and in emphasizing cognitive content rather than cognitive deficit. The scale has good reliability and validity, and it can clearly discriminate acute schizophrenic subjects from normal subjects. Although containing no obviously extreme items, the scale, in its cumulative effect, may be used to identify bizarre and eccentric thought patterns, and as an estimate of risk in the general population for schizotypal symptoms phenomenologically related to acute schizophrenia.