At SDTA, we research the systems that shape life for California's self-advocates and families, and we publish what we find.
Some content is presented as a searchable databases used as reference tools. Some of our research is analysis tied to a specific policy moment, like our review of DDS's proposed "cost-effective" definition and the record of what the community said about it in two DDS webinars. Some of our research content is about listening to the community we serve. Our quarterly reports on what families are telling us directly, and research on what builds trust between families and the agencies that serve them are examples.
All research draws on the following elements:
We always do out best to publish our method next to our conclusions, not just the numbers. If you think any of our research is wrong or out of date, please contact us.

The DDS Directive Explorer is a searchable database of all 327 substantive DDS directives, guidance documents, and regional center correspondence from March 2020 through June 2026. Each entry carries SDTA's own triage notes on whether and how it matters to families, and you can filter by topic, document type, status, and more.
The SDP Fair Hearings Explorer is a searchable record of 170 California SDP fair hearing decisions, coded by issue type, outcome, statute cited, and regional center. Families are denied outright 75% of the time and win full relief in only 15% of cases, with the worst odds on budget-increase and equipment requests.

The Cost-Effective Definition Meeting Companion is an 8-topic briefing built for the DDS committee writing the new statutory definition of "cost-effective" under AB 143. It covers what's changing, how other states define the term, what the fair-hearing record already shows, and SDTA's five-part counter-proposal.
SDTA's summary of 584 attendee comments from two DDS webinars (June 29-30, 2026) on the proposed cost-effective definition. Families and service providers, despite sitting on opposite sides of the same pay question, arrived at the same conclusion: not one comment in either session defended the proposed rate cap.
The full verbatim record behind the summary above, all 584 comments sorted into the same 14 categories, in English and Spanish exactly as submitted.
Usage and outcome data for DAN, SDTA's free bilingual navigation tool, through August 2, 2026. 1,549 sessions across all 21 regional centers, 80% of engaged families leaving with a concrete next step, and the "silence" that never becomes a formal denial made countable for the first tim
A research brief on how DDS can build trust with the developmental disability community, drawing on OECD trust research, procedural justice studies, and California's own equity data. Includes a one-page "family-impact self-check" DDS could run on any directive before it ships.
SDTA's first quarterly listening report, combining a community survey, feedback gathered at a DVU SDP Connect meeting, and DAN session data. Published in English and Spanish with full parity.
Primer informe trimestral de escucha de la SDTA, que integra una encuesta a la comunidad, los comentarios recopilados en una reunión de DVU SDP Connect y los datos de las sesiones de DAN. Publicado en inglés y español con total paridad.
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