Reliability and validity of the unhelpful thoughts and beliefs scale for Persian-speaking adults who stutter (UTBAS-P): A cross-cultural examination of social anxiety in people who stutter.

Background And Aim: An increasing body of research indicates that many adults who stutter (AWS) experience anxiety in social and verbal situations. The Unhelpful Thoughts and Beliefs about Stuttering (UTBAS) scales were developed to assess speech-related anxiety and negative cognitions associated with stuttering. This study aimed to translate the UTBAS into Persian, investigate its psychometric properties for Persian-speaking AWS, and compare the results with previously published UTBAS scores across various cultures.

A Persian-version of the stuttering severity instrument-version four (SSI-4): How the new additions to SSI-4 complement its stuttering severity score?

Purpose: The fourth version of the Stuttering Severity Instrument (SSI-4) has been available since 2009. It has some modifications and new features which make it more appropriate at least for clinical practice, although further documentation is needed. The objective of the current research was to translate SSI-4 into Persian language and to discuss its relative and absolute reliability as well as its criterion validity for Persian adults who stutter (PWS).