difference between validity and reliability in research

The OBS-SV total score had a strong correlation with each of the OBS-SV domain scores. The Pearson’s coefficients for the OBS-SV domain scores ranged from 0.771 to 0.943, and they were positively and strongly linked with one another ( p < 0.001). Results: OBS-SV showed strong test–retest reliability for both the total and the domains scores, as well as a high level of internal consistency. Subjects were assessed with the SCID-5, the Yale Brown Obsessive Compulsive Scale (Y-BOCS) and the OBS-SV.

Methods: Forty three subjects with a clinical diagnosis of OCD according to the Diagnostic and Statistical Manual of Mental Disorders (DSM-5) 42 subjects with a clinical diagnosis of social anxiety disorder (SAD), and 60 individuals without current or lifetime mental disorders (HC) were recruited from the Psychiatric Clinic of the University of Pisa.

The goal of the current study is to ascertain the psychometric characteristics of the Obsessive–Compulsive Spectrum–Short Version (OBS-SV), a novel questionnaire designed to measure the complete range of obsessive–compulsive symptoms, from severe full blown to subthreshold ones. In particular, the conceptualization of an obsessive–compulsive spectrum appears to be in line with the very first descriptions of Obsessive–Compulsive Disorder and has been partially acknowledged by the inclusion of the “OCD-spectrum related syndromes and disorders” section in the DSM-5.

Department of Clinical and Experimental Medicine, University of Pisa, Pisa, ItalyĪim: In the recent years, a rising amount of research has stressed the importance of a dimensional perspective on mental disorders.

Liliana Dell’Osso †, Benedetta Nardi * †, Chiara Bonelli, Davide Gravina, Francesca Benedetti, Luca Del Prete, Gabriele Massimetti, Giulia Amatori, Barbara Carpita and Ivan Mirko Cremone

Difference between validity and reliability in research