Disability Evaluation Study Design First Interim Report (1997) / Chapter Skim
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3 SSA's Proposed Design for the Disability Evaluation Study
3 SSA's Proposed Design for the Disability Evaluation Study
Pages 5-17
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From page 5... ...
as planned by SSA; identify the key survey design and sampling plan, data collection, and operational decisions made to date; and discuss some of their limitations as they relate to the efficiency of the sampling plan and accepted statistical principles and practices. We also lay out alternatives for SSA to consider and rule on prior to making final decisions about the design and operation of the DES in the scope of work for the survey REP.
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RECOMMENDATION 3-~. The committee strongly endorses the conduct by the Social Security Administration of a well-designed, carefully pretested, and statistically sound Disability Evaluation Study.
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Mimi assumed an additional role of evaluating the proposed redesigned process and of serving as a source for testing functional assessment instruments and the decision process itself. The protocol proposed by We stat was modified to accommodate these additional roles of the DES.
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SSA expects stage 2 to provide a direct field test of the redesigned disability decision process under development. The interview, medical examination, and functional assessment instruments used in stage ~ will also be administered to the stage 2 sample, as will any new or modified functional assessment instruments required for testing the redesigned disability decision process that were not available for inclusion in stage I
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increasingly survey operations, especially for large scale surveys, are being preceded by small scale, carefully structured field testing coupled with laboratory research, so that definitions and concepts critical to the results can be better understood. Geographically, socially, and educationally dispersed nonprobability samples, laboratory subjects, or both are adequate to develop and pretest the functional assessment instruments.
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Final Changes in Redesign MethodDone as a result of the pretesting and pilot testing, as well as relevant laboratory testing. This research would facilitate, prior to the conduct of the main survey, final resolution of issues tied to the redesigned decision process, e.g., developing an acceptable functional assessment instrument and experimenting with the use of Department of Labor's O*
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From page 11... ...
Larger sample size for national estimates National estimates would be derived from the full national sample drawn from a larger number of primary sampling units, as opposed to the half samples containing data based on different questions and testing instruments. Uniform data sets~ne uniformly gathered set of data would be available, rather than two half samples with less than fully comparable data.
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12 o · _ ·= ._ ·_1 a' V: ._ o A o Pa o sin ._ a' V: o I .
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The differences in outcomes resulting from changing the decision process is likely to be minimal if any for persons with severe disabilities, but some real differences could show up among borderline cases under alternate 4According to the draft scope of work, this sample of current beneficiaries may be drawn from screened cases, from SSA administrative records, or both.
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From page 14... ...
The impact of these two recommendations on the timeline of the DES and on SSA's research on the proposed changes in the disability decision process are shown in Figure 3-~. There one can see that the committee's recommendation to gather DES data as part of a single national survey, rather than as part of two potentially incompatible half samples, implies a period of at least 24 months instead of 12 months for the research, development, and testing activities.
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15 ~ 8 ~7 ~ ~lx 1 Is -- T=\ 1 : IgY I LT°° T ~ 1 ~1~ ~.~.1 ~ ~ v ..
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RECOMMENDATION 3-4. The committee recommends that the Social Security Administration use relevant data from the National Health Interview Survey Disability Supplement, National Health and Nutrition Examination Survey, Survey of Income and Program Participation, and other relevant surveys to assist in developing the sample design, survey operation, and questionnaire content for the Disability Evaluation Study.
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~Repeated with many variables training, and supported employment Use of vocational rehabilitation services Repeated with many variables Use of assistive devices ~ ~ Income and ssets ~_ _ n ~ ~Employment status or work history (ever worked, type of work, volunteer work) Need for accommodations in order to work (e.g., ramps, parking, special workstation)
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