normalization of the nonword repetition test in farsi-speaking children

Introduction: the phonological working memory (pwm) plays an essential role in manycognitive functions, such as language acquisition. impaired pwm can result in learningdisability. therefore, the existence of a standard test for the assessment of this ability, especiallyin children, is vital. evidence suggests that the non-word repetition (nwr) task is a goodrepresentative of pwm competence. this study aimed to normalize the nwr test for farsispeakingchildren. also, we aimed at assessing the external reliability of this test.materials and methods: the nwr test, including main and parallel tests, was performed on455 typically-developed children in five age groups ranging from four to nine years old. weattempted to have an almost equal number of participants in different socio-economic statusgroups and sexes.results: we found a remarkable relationship between the main and parallel test results(p≤0.001). there was a direct relationship between age and nwr performance in the main(p≤0.001) and the parallel (p≤0.001) tests. also, boys obtained better total scores in the main(p=0.002) and the parallel (p≤0.001) tests.conclusion: the test has high external reliability. the results showed non-word repetitionability increased with age. the reported standard scores and normative data can be used forscreening and assessing pwm among children.