Reliability and validity study of a Turkish version of the Communicative Effectiveness Survey‐Revised (CES‐R)
Authors: Atalar Merve Sapmaz , Genç Gençer , Erim Ahsen , Pehlivan Beyza , Sakın Bertuğ , Bulut Serpil , Donovan Neila J. 
Published: July 2023

AbstractBackgroundCommunication of people with Parkinson's disease (PwPD) is negatively affected. For PwPD with communication difficulties, it is important to use self‐assessment tools as a primary assessment approach to evaluate their perspectives on communication. It is also important to evaluate PwPDs with self‐assessment scales in order to determine in which situations their communicative effectiveness is affected and to include them in the intervention plan.AimsTo create a Turkish version of the Communicative Effectiveness Survey‐Revised (CES‐R), to examine its validity and reliability, and to investigate its applicability in PwPD.MethodThe study included 106 PwPD and 106 healthy participants. The original form of the CES‐R was adapted into Turkish according to international guidelines. Every participant completed the Turkish version of CES‐R and the Voice Handicap Index‐10 form. The adapted scale was retested 2 weeks later.Outcomes and ResultsBecause the Kaiser‐Meyer‐Olkin coefficient was 0.956 in the exploratory factor analysis of the CES‐R and p < 0.01 for Bartlett's Test, the data set is ‘perfectly’ suitable for factor analysis. In the explanatory factor analysis applied in the CES‐R scale, the total explanatory ratio of the two dimensions was determined as 63.5%, and the validity condition was met. Cronbach's alpha coefficient was 0.958 in the PwPD group and 0.955 in the control group and the scale was found to be at the ‘high reliability’ level.ConclusionThe CES‐R is a valid, reliable, and useable self‐assessment scale for Turkish PwPD. Furthermore, this adaptation research was developed to assess possible communication difficulties for PwPD. With this tool, difficulties in communication skills that can be identified by a comprehensive evaluation should also be studied in the intervention processes.What this paper addsWhat is already known on the subject
Self‐assessment tools are suggested as a primary use when evaluating people with Parkinson's disease (PwPD) with communication difficulties. The CES‐R is one of these self‐assessment scales. However, the validity and reliability study of the Communicative Effectiveness Survey‐Revised (CES‐R) in Turkish has not been conducted.What this paper adds to existing knowledge
This study demonstrates the validity and reliability of the Turkish CES‐R scale and its applicability to PwPD. Furthermore, this scale can be used in assessment procedures for possible communication difficulties for PwPD.What are the potential or actual clinical implications of this work?
The scale, which is unidimensional in the literature, was found to have two dimensions with eigenvalues > 1 in the Discovery Factor analysis in this study. The first dimension was named communication in general situations (CGS) and the second dimension was named communication in difficult situations (CDS). It is thought that this scale will be useful in research and clinics for the comprehensive assessment of PwPD with communication difficulties before and after treatment.