Rehabilitation treatment specification system: latest tools, trials, and pathways to advance the science underlying voice therapy

Purpose of review This review summarizes the latest advances in applying the rehabilitation treatment specification system (RTSS) to voice therapy. Recent findings Recent RTSS work has moved beyond conceptual endorsement to practical demonstrations in vocal rehabilitation. Multiple studies now provide complete RTSS specifications of voice therapy protocols and everyday clinical care, supporting content validity and enabling direct comparison of treatment components across approaches and sites. RTSS-guided intervention development has produced componentized protocols that translate treatment theories into explicit ingredient-target hypotheses suitable for refinement through empirical testing. RTSS-based mapping has also clarified overlap and meaningful differences across evidence-based therapies. Finally, RTSS-informed evidence synthesis has reduced heterogeneity in meta-analytic work by regrouping studies according to mechanism-relevant component categories (organ functions vs. skills & habits), yielding more interpretable patterns of treatment effects. Summary The RTSS is emerging as a practical infrastructure for cumulative, component-based voice therapy science, supporting clearer intervention reporting, mechanistic interpretation, cross-disciplinary transfer, and scalable adoption in routine documentation.