BACKGROUND AND PURPOSE Attempts have been made to provide guidelines for interpreting Barthel scores. We used a Rasch analysis to improve the measurement properties and clinical interpretability of the Barthel index score. METHODS A specific extension of Rasch model was used to identify items that preclude the summation of items and to improve the item rating scale by examining the scores on ...

OBJECTIVE Anxiety is a common non-motor symptom in Parkinson's disease (PD). This study analyzed the measurement properties of three frequently used anxiety scales in PD: the Beck Anxiety Inventory (BAI), the Hamilton Anxiety Rating Scale (HARS), and the Hospital Anxiety and Depression Scale-Anxiety subscale (HADS-A). METHOD The Rasch model was applied to a multicenter international cohort of...

The purpose of this study was to determine if the characteristics of the optimal categorization identified by the Rasch analysis in a previous study can be maintained when the revised scale is applied to the same population. Based on the results of the previous Rasch analysis, a 23-item exercise barrier scale was modified from its original five-category structure ("Very often" = 1, "Often" = 2,...

This study uses the Rasch rating scale analysis within the framework of the social cognitive theory to examine four psychometric properties of the Arabic version of the Physical Activity Self-efficacy Scale for Adolescents (PASESA-Av): 1) item technical quality to evidence content validity; 2) unidimensionality structure to evidence structural validity; 3) rating scale functioning to evidence s...

[Purpose] The purpose of this study was to investigate the psychometric properties of the Falls Efficacy Scale using Rasch analysis in patients with hemiplegic stroke. [Subjects] Fifty-five community-dwelling hemiplegic stroke patients were selected as participants. [Methods] Data were analyzed using the Winsteps program (version 3.62) with the Rasch model to confirm the unidimensionality throu...

OBJECTIVE To investigate whether using a parametric statistic in comparing groups leads to different conclusions when using summative scores from rating scales compared with using their corresponding Rasch-based measures. METHODS A Monte Carlo simulation study was designed to examine between-group differences in the change scores derived from summative scores from rating scales, and those der...