Department of Audiology, School of Health Sciences, University of Kwa Zulu-Natal, Durban.
S Afr J Commun Disord. 2020 Nov 9;67(1):e1-e7. doi: 10.4102/sajcd.v67i1.690.
This study continued the development of an isiZulu speech reception threshold (zSRT) test for use with first language, adult speakers of isiZulu.
The objective of this study was to determine the convergent and concurrent validity of the zSRT test.
One hundred adult isiZulu first-language speakers with normal hearing and 76 first-language, adult isiZulu speakers with conductive or sensorineural hearing losses ranging from mild to severe were assessed on pure tone audiometry and a newly developed isiZulu SRT test. Convergent validity was established through agreement of the zSRT scores with pure tone average (PTA) scores. Concurrent validity was assessed by examining the steepness of the psychometric curve for each word in the zSRT test for each type and degree of hearing loss.
Intraclass correlation coefficient analyses showed zSRT scores were in substantial to very high agreement with PTA scores for the normal hearing and hearing loss groups (NH - right ear ICC consistency = 0.78, left ear ICC = 0.67; HL - right ear ICC consistency = 0.97, left ear ICC consistency = 0.95). The mean psychometric slope (%/dB) at 50% correct perception for all words in the zSRT test was 4.92%/dB for the mild conductive hearing loss group, 5.26%/dB for the moderate conductive hearing loss group, 2.85%/dB for the moderately severe sensorineural hearing loss group and 2.47%/dB for the severe sensorineural hearing loss group. These slopes were appropriate for the degree of hearing loss observed in each group.
The zSRT test showed convergent and concurrent validity for assessing SRT in first language, adult speakers of isiZulu.
本研究继续开发祖鲁语语音识别阈（zSRT）测试，用于母语为祖鲁语的成年母语使用者。
本研究的目的是确定 zSRT 测试的收敛效度和同时效度。
100 名母语为祖鲁语、听力正常的成年母语使用者和 76 名母语为祖鲁语、听力损失从轻度到重度的传导性或感音神经性听力损失的成年母语使用者接受纯音测听和新开发的祖鲁语 SRT 测试。收敛效度通过 zSRT 评分与纯音平均（PTA）评分的一致性来确定。同时效度通过检查 zSRT 测试中每个词的心理测量曲线在每种类型和程度的听力损失中的陡峭程度来评估。
组内相关系数分析表明，zSRT 评分与正常听力和听力损失组的 PTA 评分具有高度一致性（NH-右耳 ICC 一致性=0.78，左耳 ICC=0.67；HL-右耳 ICC 一致性=0.97，左耳 ICC 一致性=0.95）。在 zSRT 测试中所有词的 50%正确感知的平均心理测量斜率（%/dB）为轻度传导性听力损失组为 4.92%/dB，中度传导性听力损失组为 5.26%/dB，中度感音神经性听力损失组为 2.85%/dB，重度感音神经性听力损失组为 2.47%/dB。这些斜率与每个组中观察到的听力损失程度相符。
zSRT 测试在评估母语为祖鲁语的成年母语使用者的 SRT 方面具有收敛效度和同时效度。
