title: Preliminary validity data on the Rasch Manic-Depressiveness Scale.
abstract: The 18-item Manic-Depressiveness Scale was revised via a Rasch top-down purification' procedure to provide a new 12-item scale with no significant age or sex bias. Application of this scale to previously collected data indicated that patients with manic-depression and schizophrenia receive comparable scores, which are significantly higher than those of a control group of students. Moreover, for a subgroup of patients with manic-depression, scores correlated .55 (p<.001) with number of manic-depression-relevant medications being taken. These findings lend support to the validity of the Rasch Manic-Depressiveness Scale as a general measure of psychoticism and psychiatric status.
authors.affiliation: Department of Psychology, Adelaide University, Australia. psym-tha@psychology.adelaide.edu.au
authors.forename: Michael A
authors.initials: MA
authors.lastname: Thalbourne
authors.forename: James
authors.initials: J
authors.lastname: Houran
mesh_terms: D001714:Bipolar Disorder / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008297:Male; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires