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Single word tests are used frequently to determine clients' speech sound errors. These tools are user-friendly and popular for speech and language pathologists. The aim of this study was to design and validate a single word test for the assessment of speech sound production for Persian speaking children.

The present study included two phases. In phase I, test material was developed. Psychometric properties were evaluated in phase II. In the next phase, 525 typically developing Persian-speaking children with the age range of 3–5 years old were studied. Statistical Package for the Social Sciences, version 24.0 (SPSS, Inc., Chicago, IL) was used for statistical analysis of this study. The significance level was set at (p < 0.05). Pilot study was performed by administrating the test on 25 typically developing children, construct validity: by administrating the test on 400 typically developing children …