Concurrent validity for the Rust Inventory of Schizotypal Cognitions

Abstract

The present study evaluated the concurrent validity of the Rust Inventory of Schizotypal Cognitions (RISC) using the MMPI and the Psychosis Proneness Scales. Multiple regression techniques applied to the RISC and the other measures employed offer support for the validity of this measures as a screening instrument for use in non-clinical samples.

Schizotypy, dissociative experiences and childhood abuse: Relationships among self‐report measures

“…This correlation is also only slightly lower than some of the correlations that have been found between diåerent measures of putatively similar aspects of schizotypy. For example, Balogh, Merritt & Steuerwald (1991) found a correlation of .60 between the RISC (Rust, 1988) and the Perceptual Aberration scale (Chapman & Chapman, 1985). Thus, if dissociation and the dimensions of schizotypy are indeed phenomenologically distinct and have diåerent origins, as theory suggests, these results point to limitations in the discriminant validity of these measures.…”

A validity study of two projective object representations measures.

“…Friedman, Gleser, Smeltzer, Wakefield, and Schwartz (1983) used the Psychotic Triad and the traditional Neurotic Triad (Hypochondriasis, Depression, and Hysteria) as the basis for constructing the “psychotic overlap scale” and the “neurotic overlap scale”—sets of items overlapping psychotic triad or neurotic triad scales—on each of which hospitalized patients diagnosed into either psychotic or neurotic groups scored significantly differently from each other. Balogh, Merritt, & Steuerwald (1991) reported significant relations between the Rust Inventory of Schizotypal Cognitions (Rust, 1989) and MMPI Scales 6–10, but none with 1–3 in an undergraduate population. Wetzler and Marlowe (1993) used clinician diagnoses of hospitalized patients to establish psychotic, depressed, and manic groups (individuals could fall into more than one group) and compared nonpsychotics to psychotics on the MMPI scales.…”