Research Article

Developing of Persian version of the BKB sentences and content validity assessment


Background and Aim: With regard to the shortage of proper materials in Persian for the evaluation of speech perception in children, this study aimed to develop the Persian version of the BKB sentence test, and determine its content validity in normal Persian speaking children aged 6-12 years.
Methods: This study was an applied research. The study procedure comprised sentence construction, determining their content validity, and degree of difficulty when presenting to 15 normal children with noise background. The selected sentences were short with high redundancy, a simple structure, and containing words appropriate to vocabulary of grade one and two children. Content validity of the sentences was determined by Lawshe method through presenting them to 10 experts. Sentences were presented in different signal to noise ratios (SNRs) to 15 children aged 6-12 years. The average SNR for each sentence was determined. The upper and lower limit to select the final sentences were determined by calculating the average and standard deviation of SNR to perceive the sentences.
Results: According to experts’ opinions, out of 220 selected sentences, 200 sentences obtained acceptable level of content validity (CVR˃0.62). In addition, analyzing the data from the average SNR for sentence perception revealed that 43 sentences were harder or easier than the acceptable range that were removed from the sentence package. The remaining 157 sentences were categorized into 10 equivalent lists.
Conclusion: The findings indicate that the Persian version of the BKB sentence test has good content validity and is applicable in research and clinical studies.

1. Wilson RH, McArdle R. Speech signals used to evaluate functional status of the auditory system. J Rehabil Res Dev. 2005;42(4 Suppl 2):79-94.
2. Wilson RH, McArdle RA, Smith SL. An evaluation of the BKB-SIN, HINT, Quick SIN, and WIN materials on listeners with normal hearing and listeners with hearing loss. J Speech Lang Hear Res. 2007;50(4):844-56.
3. Bench J, Kowal A, Bamford J. The BKB (Bamford-Kowal-Bench) sentence lists for partially-hearing children. Br J Audiol. 1979;13(3):108-12.
4. Mueller HG. Speech audiometry and hearing aid fittings: going steady or casual acquaintances? Hear J. 2001;54(10):19-29.
5. Flexer C. The impact of classroom acoustics: listening, learning, and literacy. Semin Hear. 2004;25(2):131-40.
6. Crandell CC, Smaldino JJ. Classroom acoustics for children with normal hearing and with hearing impair¬ment. Lang Speech Hear Serv Sch. 2000;31(4):362-70.
7. Sarant JZ, Blamey PJ, Dowell RC, Clark GM, Gibson WP. Variation in speech perception scores among children with cochlear implants. Ear Hear. 2001;22(1):18-28.
8. Narain C, Scott SK, Wise RJ, Rosen S, Leff A, Iversen SD, et al. Defining a left-lateralized response specific to intelligible speech using fMRI. Cereb Cortex. 2003;13(12):1362-8.
9. Meekings S, Evans S, Lavan N, Boebinger D, Krieger-Redwood K, Cooke M, et al. Distinct neural systems recruited when speech production is modulated by different masking sounds. J Acoust Soc Am. 2016;140(1):8.
10. Oreinos C, Buchholz JM. Evaluation of loudspeaker-based virtual sound environments for testing directional hearing aids. J Am Acad Audiol. 2016;27(7):541-56.
11. Etymotic Research: Bamford-Kowal-Bench Speech-in-Noise Test (Version 1.03 Audio CD) Elk Grove Village, Etymotic Research. 2005
12. Schafer EC. Speech perception in noise measures for children: a critical review and case studies. J Educ Audiol. 2010;16:4-15.
13. Nematzadeh S. Identification of Iranian primary school students core vocabulary: a brief report of a national project. Journal of Curriculum Studies. 2008;3(9):8-17.
14. Smits C, Houtgast T. Recognition of digits in different types of noise by normal-hearing and hearing-impaired listeners. Int J Audiol. 2007;46(3):134-44.
15. Emami SF. Word recognition score in white noise test in healthy listeners. Sch J App Med Sci. 2015;3(1A):29-33.
16. Lotfi Y, Salim S, Mehrkian S, Ahmadi T, Biglarian A. The Persian version of words-in-noise test for young population: development and validation. Aud Vest Res. 2016;25(4):194-200.
IssueVol 26 No 1 (2017) QRcode
SectionResearch Article(s)
BKB sentence validity Persian signal to noise ratio

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Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
How to Cite
Moossavi A, Mehrkian S, Karami F, Biglarian A, Mahmoodi Bakhtiari B. Developing of Persian version of the BKB sentences and content validity assessment. Aud Vestib Res. 26(1):27-33.