Validity and Reliability of Persian Version of WASSP Test for Adults with Stutter

Abstract

Objectives: An essential need in Iran for the application of stuttering self-rating tools for the people who stutter (PWS) and its conversion into Persian language has encouraged this research to examine the validity and reliability of Wright and Ayre Stuttering Self-Rating Profile (WASSP) test to the benefits of adult Persianspeaking individuals who stutter. WASSP is an excellent tool for assessment and measuring outcomes and a beneficial tool for clinicians and clients as well. So, the purpose of this study is to examine the content validity by some speech and language pathologists in Iran, then to evaluate the reliability of the WASSP test for adult Persianspeaking people with stutter. Methods and Procedure: The participants were 24 (20 males and 4 females) stutterers who were Persian speaking, 1830 years old (mean 24 years) with no medical or behavioral problems. 20 skilled Speech Language pathologists (SLPs) who were independent of the research, participated in the study to evaluate translation and content validity of the test. Cronbach’s alpha coefficients were used to assess internal consistency of items and reliability assessed by estimating Intraclass Correlation Coefficients (ICC) in test-retest