Psychometric Properties of the Hoarding Rating Scale-Self-Report (HRS-SR): Evidence from Classical Test Theory and Item Response Theory Based on Secondary Data

The Hoarding Rating Scale-Self Report (HRS-SR; Tolin et al., 2010) is a well-established and internationally-recognised tool used to assess hoarding severity, which has been validated and translated across countries and cultures. However, to date, its psychometric properties have not been systematically examined within an Indian context where hoarding behaviour is a known issue. This study assessed the psychometric properties of the HRS-SR among 357 Indian college students (M _age = 21.47, SD _age = 2.24; 67.8% female) using classical test theory (CTT) and more robust item response theory (IRT). The HRS-SR was found to have a unidimensional factor structure and showed acceptable factor loadings, with good internal consistency (α = .825, ω = .828) and composite reliability (.817). Findings also indicated similar response patterns across male and female responders. Taken together, this study validates and supports the utility of the HRS-SR within Indian samples, with discussions focused around how academic researchers and clinicians can and should capitalise on this tool and build upon our findings.