[Validation of the Italian version of the DISCUS (DISC-Ultra Short), a brief standardized scale for assessing experienced discrimination among people with mental disorders.]

Aim: To evaluate the psychometric properties of the DISCUS (DISC-Ultra Short), a measure which assesses experienced discrimination among persons with mental disorders. Methods: Data collected in the three Italian sites (Brescia, Napoli, and Verona) participating at the international project INDIGO-DISCUS. Each Italian site recruited a sample of 50 individuals. Participants were evaluated with the DISCUS. This study evaluated: (a) reliability (internal consistency), (b) validity (convergent and divergent), (c) precision, and (d) acceptability. Participants were also asked to complete three additional measures: Stigma Consciousness, Brief Stigma Coping/Stigma Stress, and Internalized Stigma of Mental Illness (ISMI-10). Results: Overall, 149 people participated; 55% were males, with mean age of 48 (±12.4) years and on average participants had 12 (±3.4) years of education; only 23% were employed. Internal consistency was found to be good (Cronbach α=0.79). Convergent validity was confirmed (all correlations between DISCUS score and the other measures' scores were greater than 0.30). There was evidence of divergent validity, as the overall DISCUS score was not associated with the variable "sex". Precision showed a high correlation coefficient between the various items and the overall DISCUS score, with only one exception (discrimination when looking for housing), which showed a particularly high frequency of "not applicable" responses. Acceptability [measured with Maximum Endorsement Frequencies (MEF) and Aggregate adjacent Endorsement Frequencies (AEF)] was found to be fair (MEF violated in 2 items; AEF partially violated in 5 item). Conclusions: The Italian version of the DISCUS is a reliable, valid, precise, and acceptable measure of experienced discrimination to be used in large scale studies in the evaluation of anti-stigma initiatives in Italy.