| Sumario: | The article discusses the development and validation of the Upper Extremity Functional Scale for Prosthesis Users (UEFS-P), highlighting both its strengths and areas of concern regarding its measurement structure. The authors commend the use of qualitative and quantitative methodologies, particularly the Rasch model, but express concerns about the interpretation of response categories, specifically the inclusion of "Did not do" as a valid response. They argue that this category should be treated as missing data to improve the scale's functionality and validity, suggesting that the current scoring structure conflates task relevance with functional ability. The letter aims to provide constructive feedback to enhance the scale's effectiveness for prosthesis users.
|
|---|