Normalization of the Non-word Repetition Test in Farsi-speaking Children

  • Hamidreza Farmani ORCID Department of Speech Therapy, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran.
  • Fatemeh Sayyahi ORCID Department of Speech Therapy, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran.
  • Zahra Soleymani ORCID Mail Department of Speech Therapy, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran.
  • Fariba Zadeh Labbaf Department of Speech Therapy, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran.
  • Elnaz Talebi Department of Speech Therapy, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran.
  • Zahra Shourvazi Department of Speech Therapy, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran.
Keywords:
Non-word repetition, Working memory, Normality, Standardization test, Reliability

Abstract

Introduction: The Phonological Working Memory (PWM) plays an essential role in many cognitive functions, such as language acquisition. Impaired PWM can result in learning disability. Therefore, the existence of a standard test for the assessment of this ability, especially in children, is vital. Evidence suggests that the Non-Word Repetition (NWR) task is a good representative of PWM competence. This study aimed to normalize the NWR test for Farsi-speaking children. Also, we aimed at assessing the external reliability of this test.
Materials and Methods: The NWR test, including main and parallel tests, was performed on 455 typically-developed children in five age groups ranging from four to nine years old. We attempted to have an almost equal number of participants in different socio-economic status groups 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 repetition ability increased with age. The reported standard scores and normative data can be used for screening and assessing PWM among children.

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Published
2019-09-28
How to Cite
1.
Farmani H, Sayyahi F, Soleymani Z, Zadeh Labbaf F, Talebi E, Shourvazi Z. Normalization of the Non-word Repetition Test in Farsi-speaking Children. jmr. 12(4):217-224.
Section
Research Article(s)