Strengths and challenges of the COSMIN tools in outcome measures appraisal: A case example for speech-language therapy.

The COSMIN tools offer detailed standards to support the appraisal of outcome measures available to SLTs. However, several limitations were observed, and recommendations to support the application of the COSMIN tools are provided. What this paper adds What is already known on the subject Collecting outcome data is essential to ensure speech and language therapy is effective. Until the development of COSMIN there was a lack of standards in the way the measurement properties of outcome measure instruments were appraised. What this paper adds to existing knowledge This paper used the FOCUS, a measure of pre-schoolers' communicative participation outcomes in speech and language therapy, as a case example to illustrate the applications of the COSMIN tools. In doing so, the strengths and limitations of the current COSMIN tools in appraising the quality of outcome measure instruments are emphasized. What are the potential or actual clinical implications of this work? The COSMIN tools offer a step-by-step, standardized approach to appraise various measurement properties in outcome instruments. Due to existing limitations of the COSMIN tools, appraisal should provide clear and specific recommendations so users of outcome measures (e.g., SLTs, researchers) can identify the appropriate uses of each instrument.