Beykirch H L, Gaeth J H
J Aud Res. 1978 Jul;18(3):153-64.
Performance-intensity functions were drawn for each of the 5 progressively more difficult 8-word subtests of Gaeth's Speech Discrimination Scale (SDS) with 16 limited-hearing Ss aged 20-88 yrs. Prior examination with the NU-6 test at 24 db SL revealed speech discrimination ability groupings, unrelated either to pure-tone ac hearing losses or to age. The largest (middle) group achieved scored of 50%-correct at -5, 0, 11, and 14 db SL (re pure-tone ac HTL averaged for the better 2 of the frequencies .5, 1, and 2 kc/s) for the subtests Digits, Easy Letters, Easy Words and Hard Letters respectively, as compared with 30 db SL for full PB lists; and never achieved 50%-correct for the Hard Words subtest. The possibility was suggested that the clinician might initiate speech testing with the East Words subtest and proceed to either more or less difficult subtests/levels as S responds. Each item would contain more statistical power than a single item in a 50-word PB list at a single SL.
针对盖思言语辨别量表（SDS）中5个难度逐渐增加的8字词子测试，为16名年龄在20至88岁之间、听力受限的受试者绘制了表现强度函数。之前在24分贝感觉级下用NU - 6测试进行的检查揭示了言语辨别能力分组，这与纯音气导听力损失或年龄均无关。最大（中间）组在数字、简单字母、简单单词和难字母子测试中，分别在-5、0、11和14分贝感觉级（相对于0.5、1和2千周/秒中较好的两个频率的纯音气导听力损失平均值）时达到了50%的正确率，而完整PB列表为30分贝感觉级；并且在难单词子测试中从未达到50%的正确率。这表明临床医生可能会从简单单词子测试开始进行言语测试，并根据受试者的反应进行难度更高或更低的子测试/水平测试。每个项目在统计上比在单一感觉级下50字词PB列表中的单个项目具有更大的效力。
