Behaviour Research and Therapy 42 (2004) 1163–1182 www.elsevier.com/locate/brat Measurement of compulsive hoarding: saving inventory-revised Randy O. Frost a, , Gail Steketee b , Jessica Grisham c a DepartmentofPsychology,SmithCollege,Northampton,MA01063,USA b BostonUniversitySchoolforSocialWork,264BayStateRoad,Boston,MA02215USA c DepartmentofPsychology,BostonUniversity,Boston,MA02215USA Received 26 February 2003; received in revised form 21 July 2003; accepted 23 July 2003 Abstract Four studies examined a new measure of compulsive hoarding (Saving Inventory-Revised; SI-R). Fac- tor analysis using 139 hoarding participants identified 3 factors: difficulty discarding, excessive clutter, and excessive acquisition. Additional studies were conducted with hoarding participants, OCD parti- cipants without hoarding, community controls and an elderly sample exhibiting a range of hoarding behavior. Internal consistencies and test–retest reliabilities were good. The SI-R distinguished hoarding participants from all other non-hoarding comparison groups. The SI-R showed strong correlations with other indices and methods of measuring hoarding (beliefs, activity dysfunction from clutter, observer rat- ings of clutter in the home) and relatively weaker correlations with non-hoarding measures (positive and negative affect and OCD symptoms). The SI-R appears to be an appropriate instrument for assessing symptoms of compulsive hoarding in clinical and non-clinical samples. # 2003 Elsevier Ltd. All rights reserved. Keywords: Acquisition; Clutter; Discarding; Hoarding; Obsessive–compulsive disorder 1. Introduction Compulsive hoarding, ‘‘the acquisition of, and failure to discard, possessions which appear to be useless or of limited value’’ (Frost & Gross, 1993) occurs in 20–30% of OCD patients (Frost, Krause, & Steketee, 1996). Hoarding has been observed in a number of other disorders  Corresponding author. Tel.: +1-413-585-3804; fax: +1-413-585-3786. E-mailaddress: rfrost@email.smith.edu (R.O. Frost). 0005-7967/$ - see front matter # 2003 Elsevier Ltd. All rights reserved. doi:10.1016/j.brat.2003.07.006