==== Front Innov Aging Innov Aging innovateage Innovation in Aging 2399-5300 Oxford University Press US 10.1093/geroni/igaa057.2321 igaa057.2321 Abstracts Session 6015 (Symposium) AcademicSubjects/SOC02600 Balancing Practicality and Validity of Elder Abuse Measures: Data From Adult Protective Services Investigations Conrad Kendon 1 Liu Pi-Ju 2 Hass Zachary 2 Conrad Karen 3 1 University of Illinois at Chicago, Chicago, Illinois, United States 2 Purdue University, West Lafayette, Indiana, United States 3 University of Illinos at Chicago, Chicago, Illinois, United States 2020 16 12 2020 16 12 2020 4 Suppl 1 Program Abstracts from The GSA 2020 Annual Scientific Meeting “Turning 75: Why Age Matters”670 670 © The Author(s) 2020. Published by Oxford University Press on behalf of The Gerontological Society of America.2020This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.Abstract Research in Adult Protective Services suffers from the problems of small sample size, low completion rates, and poor data quality. To address the “small sample size” issue, data were generated on 1,472 elder abuse cases over six months in California using the Identification, Services and Outcomes (ISO) Matrix. The problem of poor data quality was addressed by testing psychometric properties of Short-Forms on each type of abuse. Good reliability and predictive validity were found for all measures except those that were very rare. Finally, even shorter Mini-Forms were developed and tested in order to contribute to improved completion rates. Mini-Form results were mixed, and some will require further research on their reliability and validity, as well as examination of their ability to improve completion rates. Ongoing adoption by two California counties and the State of Montana demonstrate sustainability and increasing sample sizes using the ISO Matrix for research and practice.