Use of the CID W22 as a South African English speech discrimination test

Wilson, Wayne J.; Moodley, Selvarani

doi:10.4102/sajcd.v47i1.222

Cited by 11 publications

(6 citation statements)

References 7 publications

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“…First, recordings should use native talkers who exhibit a standard dialect of the target language (Weisleder & Hodgson, 1989). Evaluation of speech discrimination using recordings in a non-native dialect may significantly reduce performance, especially at presentation levels B/50 dB SPL (Wilson & Moodley, 2000). Second, words selected for the study should be familiar to the listeners, yet moderately difficult to identify (Campbell, 1965;Zakrzewski et al, 1976;Comstock & Martin, 1984;Weisleder & Hodgson, 1989).…”

Section: Sumariomentioning

confidence: 99%

Psychometrically equivalent mandarin bisyllabic speech discrimination materials spoken by male and female talkers

Nissen

Harris

Jennings

et al. 2005

International Journal of Audiology

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The purpose of this study was to develop, digitally record, evaluate, and psychometrically equate a set of Mandarin bisyllabic word lists for use in measurement of speech discrimination. Familiar bisyllabic words were digitally recorded by male and female talkers of Standard Mandarin. Percentage of correct word recognition was measured for each word at ten intensity levels ( -5 to 40 dB HL) in 5 dB increments using 20 normally hearing subjects. Using logistic regression, 200 words with the steepest logistic regression slopes were included in four psychometrically equivalent word lists of 50 words each, and eight half-lists of 25 words each. To increase auditory homogeneity of the lists, the intensity of words in each list was digitally adjusted so that the threshold of each list was equal to the midpoint between the mean thresholds of the male and female half-lists. Digital recordings of the psychometrically equivalent word recognition lists are available on compact disc.

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Section: Sumariomentioning

confidence: 99%

Psychometrically equivalent mandarin bisyllabic speech discrimination materials spoken by male and female talkers

Nissen

Harris

Jennings

et al. 2005

International Journal of Audiology

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“…On the potential for using non-South African language speech audiometry tests on South African populations, research has suggested that first-language speakers of South African English with normal hearing thresholds perform well on non-South African English speech recognition tests at suprathreshold levels but perform poorly at threshold levels. This was seen in studies using the National Acoustic Laboratories Arthur Boothroyd (NAL-AB) wordlists in Australian English (Wilson, Jones, & Fridjhon, 1998 ) and the Central Institute of the Deaf Wordlist 22 (CID W22) in American English (Wilson & Moodley, 2000 ). While not addressing SRT testing directly, these studies argue against using or adapting non-South African language speech audiometry tests for South African populations.…”

Section: Introductionmentioning

confidence: 93%

The internal and external consistency of a speech reception threshold test for isiZulu speakers with normal hearing sensitivity

Panday

Kathard

Pillay

et al. 2018

SAJCD

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Background and objectivesThis study investigated reliability, particularly the internal and external consistency, of a new isiZulu speech reception threshold (SRT) test.MethodsTo examine internal consistency, 21 adult isiZulu speakers with normal hearing sensitivity completed the SRT test using the first and second halves of the SRT wordlist in the same test session. To examine external consistency, a separate 23 adult isiZulu speakers with normal hearing sensitivity completed the SRT test, using the whole word list on two occasions 4 weeks apart. Consistency of SRT test scores in these test conditions was measured using intraclass correlation coefficient analyses (a measure of the consistency or reproducibility of different observations of the same quantity) and Bland and Altman analyses of agreement (a comparison of measurement error with the expected variation amongst subjects).ResultsIntraclass correlation coefficient values ranged from 0.69 to 0.79, showing the isiZulu test scores were highly consistent between the test and retest conditions used in this study. Bland and Altman analyses showed that isiZulu speakers with normal hearing sensitivity can be expected to return isiZulu SRT test scores that differ by no more than 7.5 dB HL – 8.7 dB HL between original and repeat assessments.ConclusionThe isiZulu SRT test was reliable, showing high internal and external consistency, when used to assess first-language speakers of isiZulu with normal hearing sensitivity. These findings warrant continued development of the isiZulu SRT test for eventual clinical use. This development should include validating this test on first-language speakers of isiZulu with and without hearing loss.

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“…Although the listeners reported the talker recordings to be clearly intelligible, listeners from Spanish-language regions other than Mexico recognized low-intensity words with less accuracy. Thus, evaluation of word recognition using recordings in a nonnative accent may significantly reduce performance, especially at presentation levels B/50 dB SPL (Wilson & Moodley, 2000). Second, words selected for speech audiometry testing should be familiar to the listeners, yet moderately difficult to identify (Zakrzewski et al, 1976;Comstock & Martin, 1984;Weisleder & Hodgson, 1989).…”

Section: Sumariomentioning

confidence: 99%

Psychometrically equivalent Russian speech audiometry materials by male and female talkers

Harris

Nissen

Pola

et al. 2007

International Journal of Audiology

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Despite the large number of individuals who speak Russian, only a limited number of high-quality speech audiometry materials are available in a standard dialect of Russian. Thus, the purpose of this study was to develop and evaluate speech audiometry materials that can be used to measure word recognition and SRT testing in quiet for native speakers of Russian. Familiar monosyllabic and bisyllabic words were digitally recorded by male and female talkers of Russian and subsequently evaluated by native listeners. Using logistic regression, psychometric functions were then calculated for all words. Selected monosyllabic words were digitally adjusted to create word recognition lists which are relatively homogeneous with respect to audibility and psychometric slope. Speech reception threshold materials were developed by selecting twenty-five bisyllabic words with relatively steep psychometric function slopes (12.1%/dB and 9.9 %/dB) and digitally equating their intensity to match the mean PTA of the native listeners. Digital recordings of the resulting psychometrically equivalent speech audiometry materials are available on compact disc.

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Use of the CID W22 as a South African English speech discrimination test

Cited by 11 publications

References 7 publications

Psychometrically equivalent mandarin bisyllabic speech discrimination materials spoken by male and female talkers

Psychometrically equivalent mandarin bisyllabic speech discrimination materials spoken by male and female talkers

The internal and external consistency of a speech reception threshold test for isiZulu speakers with normal hearing sensitivity

Psychometrically equivalent Russian speech audiometry materials by male and female talkers

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