pressures on victims create an incentive to misreport; and (3) vagueness of the disability item limits the utility of the data.
Based on their review of the problem and the literature, McCleary and Wiebe conclude that no existing survey can be adapted to provide estimates of disability-specific victimization. They noted that valid estimation of disability-specific victimization requires instead a sample survey designed specifically for that purpose. They provide specific guidance on such a survey's sample design, indicating that it should tap both the institutional and noninstitutional subpopulations, tap the proportion of the population that is moving between the institutional and noninstitutional subpopulations, and be sufficiently large to ensure nominal power for contrasts with the population of people without disabilities. Furthermore, McCleary and Wiebe note that the survey's interview methods must use items designed specifically for the subpopulation with developmental disabilities, use proxy responses only as a last resort, and use interview prompts in a manner guaranteed to produce responses of known validity.
Despite the difficulties noted above, the Crime Victims with Disabilities Awareness Act of 1998 requires the Bureau of Justice Statistics to collect data under the NCVS. In response, BJS has conducted its own review of the literature cited in this report and has undertaken a number of activities to address the law's mandate. These include meeting with national and state officials working in the area of disability and becoming active participants in two working groups dealing with disability statistics: a governmentwide group, the Federal Interagency Subcommittee on Disability Statistics (ISDS), which meets on a monthly basis to discuss the issues related to identifying people with disabilities and coordinate research in this area; and a research group convened by the Bureau of Labor Statistics to help design questions related to disability on the Current Population Survey (CPS). BJS has also established relationships with people in the disability research and advocacy communities in order to ensure that its efforts would be accepted as true reflections of the victimization experiences of people with disabilities.
In August 1999, BJS convened a group of experts from inside and