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Diagnostic accuracy of language sample measures with Persian-speaking preschool children

Lookup NU author(s): Yalda Kazemi Najafabadi, Dr Thomas Klee, Dr Helen StringerORCiD



This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0).


This study examined the diagnostic accuracy of selected language sample measures (LSMs) with Persian-speaking children. A pre-accuracy study followed by phase I and II studies are reported. Twenty-four Persian-speaking children, aged 42 to 54 months, with primary language impairment (PLI) were compared to 27 age-matched children without PLI on a set of measures derived from play-based, conversational language samples. Results showed that correlations between age and LSMs were not statistically significant in either group of children. However, a majority of LSMs differentiated children with and without PLI at the group level (phase I), while three of the measures exhibited good diagnostic accuracy at the level of the individual (phase II). We conclude that general LSMs are promising for distinguishing between children with and without PLI. Persian-specific measures are mainly helpful in identifying children without language impairment while their ability to identify children with PLI is poor.

Publication metadata

Author(s): Kazemi Y, Klee T, Stringer H

Publication type: Article

Publication status: Published

Journal: Clinical Linguistics & Phonetics

Year: 2015

Pages: 1-15

Online publication date: 21/01/2015

Acceptance date: 24/12/2014

Date deposited: 26/01/2015

ISSN (print): 0269-9206

ISSN (electronic): 1464-5076

Publisher: Informa Healthcare


DOI: 10.3109/02699206.2014.1003097


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