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We reply to Denenberg's (1999) recent critique of our work (Mody, Studdert-Kennedy, & Brady, 1997). Denenberg mounted two main lines of criticism, one concerning characteristics of the population sampled for the experimental group, and the other a statistical critique, concerning (a) violation of parametric assumptions for use of the F distribution and (b) our supposed acceptance of the null hypothesis of no differences between experimental and control groups. We show that the first criticism stemmed from a misunderstanding of the experimental hypothesis and that the second can be answered by both parametric and nonparametric comparisons across conditions within the experimental group, without reference to the control group. Thus, our original conclusion stands: The difficulty with rapid /ba/-/da/ discrimination that some children with reading impairment may experience does not stem from difficulty in discriminating the rapid spectral transitions at stop-vowel syllable onsets. 相似文献
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Present U.S. local exchange employment is less than half of what it was in 1981. This study tests several alternative explanations from labor economics, industrial organization, and political economy for employment reductions by U.S. local telephone companies. It evaluates the relative strength of the relationship between each explanatory factor and employment change. The contributions of six potential explanatory factors (wages, sales, technological change, competition, productivity, and profit rate) were investigated. Regression equation models were formulated and tested using crosssectional time-series data on 50 local carriers who provided 90% of the service between 1988 and 1995. We found that digitalization and productivity increases were the most important factors in explaining employment reductions by firms. Wage increases and computerization were significant sources for employment reduction only in the short term. 相似文献
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Poor readers are known to do consistently worsethan their normal reading peers on tasks ofphonological processing. They are characterizedby their difficulties in printed wordrecognition, phonological awareness andphonological decoding. An increasing body ofevidence points to deficits in speechperception as a source of subtle but ramifyingeffects in reading impaired children andadults. These deficits may be traced to poorlycoded phonological representations. Thisarticle will attempt to explain poor readers'difficulties in phonological coding by drawingon a gestural account speech development.Implications of this approach for readingintervention will be presented. 相似文献
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Bella Mody 《亚洲交流杂志》2013,23(2):233-234
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