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本研究以发展性阅读障碍儿童和典型发展儿童各20名为被试，采用发音抑制范式和无关言语范式，探讨语音回路的两个子成分即发音复述装置和语音存储装置对发展性阅读障碍儿童阅读理解的影响。结果发现：(1)发展性阅读障碍儿童组在正常阅读条件下的阅读成绩显著优于发音抑制条件和无关言语条件，发音抑制条件下的阅读成绩显著优于无关言语条件，而典型发展儿童组三种阅读条件下的阅读成绩无显著差异；(2)发展性阅读障碍儿童组在三种阅读条件下的阅读成绩均显著低于典型发展儿童组。这些结果说明语音回路的两个子成分对发展性阅读障碍儿童的阅读理解都有影响，且语音存储装置的影响更大；发展性阅读障碍儿童的语音回路对阅读理解的影响程度比典型发展儿童更大，其语音回路存在缺陷。 相似文献
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维吾尔语发展性阅读障碍儿童语音意识特点 总被引：2，自引：1，他引：1
通过比较四年级的维吾尔语发展性阅读障碍儿童和普通儿童在不同表征水平上的语音意识能力,发现在有关语音意识若干因素的测验上,阅读障碍儿童只是在音位意识上比普通儿童落后;而在其它更大表征单元的语音意识能力上,如音节意识和首音-韵脚意识上阅读障碍儿童没有落后.表明具有透明正字法的维吾尔语发展性阅读障碍儿童在细小的语音表征和操作能力上存在落后,表现出了跨文字一致性特点;在较大单元的语音表征和操作能力上不存在落后,表现出了透明文字的特点. 相似文献
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为考察发展性阅读障碍儿童是否存在中央执行功能缺陷，本研究使用2-back任务、数字转换任务和色词Stroop任务分别对29名发展性阅读障碍儿童和28名典型发展儿童的中央执行功能三个子成分(刷新、转移、抑制)进行比较。结果发现：发展性阅读障碍儿童在2-back任务、数字转换任务、色词Stroop任务上的正确率均显著低于典型发展儿童，且在色词Stroop任务上的缺陷效应量最大。这些结果表明发展性阅读障碍儿童在三个中央执行功能子成分上均存在不同程度的缺陷，且抑制缺陷是其核心缺陷。 相似文献
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当前汉语发展性阅读障碍儿童的干预特征为多感官语言干预、基础认知能力干预和神经调控干预等新技术新思路的综合应用。基于活动和教具的多感官语言干预能够弥补汉语阅读障碍儿童信息获取和编码等缺陷，巩固记忆效果。基础认知能力干预主要针对汉语阅读障碍儿童的工作记忆缺陷和视听知觉缺陷。工作记忆训练有助于提高视空间、语音、中央执行任务以及阅读任务的表现，知觉干预通过训练视听觉综合能力来提高阅读障碍儿童的知觉水平和阅读能力。神经反馈训练和经颅直流电刺激等神经干预方法有望从根本上提升阅读障碍者的阅读能力。未来的干预研究需要进一步依托人工智能技术开发个性化干预平台，同时通过完善神经调控技术挖掘汉语相关的生物标志物。 相似文献
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汉语阅读障碍儿童与普通儿童朗读错误研究 总被引：1，自引：0，他引：1
为反映汉语阅读障碍儿童朗读的特点,采用错误分析技术,对10名汉语阅读障碍儿童和10名普通儿童的朗读错误进行了系统的分析.结果发现:汉语阅读障碍儿童朗读流畅性与准确性都低于普通儿童,朗读中的替代错误、添加错误、省略错误都显著多于普通儿童.而二者在颠倒错误上的差异不显著.在替代错误中,音似、形似、语义及无关替代显著地多于普通儿童.与普通儿童相比,汉语阅读障碍儿童的朗读问题主要表现为错误数量更多,而不是表现为错误类型上的特点.最后结合研究发现对阅读障碍的诊断与干预提出了建议. 相似文献
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This article examines working memory functioning in children with specific developmental disorders of scholastic skills as defined by ICD-10. Ninety-seven second to fourth graders with a minimum IQ of 80 are compared using a 2 x 2 factorial (dyscalculia vs. no dyscalculia; dyslexia vs. no dyslexia) design. An extensive test battery assesses the three subcomponents of working memory described by Baddeley (1986): phonological loop, visual-spatial sketchpad, and central executive. Children with dyscalculia show deficits in visual-spatial memory; children with dyslexia show deficits in phonological and central executive functioning. When controlling for the influence of the phonological loop on the performance of the central executive, however, the effect is no longer significant. Although children with both reading and arithmetic disorders are consistently outperformed by all other groups, there is no significant interaction between the factors dyscalculia and dyslexia. 相似文献
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《Scientific Studies of Reading》2013,17(2):165-198
Recent theoretical advances in working memory guided analyses of cognitive measures in 122 children with dyslexia and their 200 affected biological parents in families with a multigenerational history of dyslexia. Both children and adults were most severely impaired, on average, in three working memory components— phonological word-form storage, time-sensitive phonological loop, and executive functions involving phonology. Structural equation modeling showed that, for children, first-order factors from the phonological, orthographic, and/or morphological word forms uniquely predicted 11 reading and writing outcomes but, for adults, a second-order factor (reflecting interrelationships among the three first-order word-form factors) was more likely to be significant in predicting the same reading and writing outcomes. Structural equation modeling of the three working memory component factors showed that the most consistent predictor of text-level reading and writing for both children and adults was the second-order word-form factor. Phonological loop and executive support could be modeled as separate factors in children but only as combined factors in adults. Executive support in children and combined phonological loop and executive support in adults contributed uniquely to oral reading but did not contribute uniquely to reading comprehension or written expression. For both children and adults, individual differences occurred as to which of the three working memory components or three word forms fell outside the normal range. 相似文献
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This study evaluated the effect of sound-symbol association training on visual and phonological memory in children with a history of dyslexia. Pretests of phonological and visual memory, a sound-symbol training procedure, and phonological and visual memory posttests were administered to children with dyslexia, to children whose dyslexia had been compensated through remedial training, and to age- and reading level-matched comparison groups. Deficits in visual and phonological memory and memory for sound-symbol associations were demonstrated in the dyslexia group. For children with dyslexia and children whose dyslexia had been remediated, the sound-symbol training scores were significantly associated with word and pseudoword reading scores and were significantly lower than those of the comparison groups. Children with dyslexia and children whose dyslexia had been compensated showed significantly less facilitation of phonological memory following the training than did typical readers. Skilled readers showed some reduction in accuracy of visual memory following the training, which may be the result of interference of verbalization with a predominantly visual task. A parallel decrease was not observed in the children with dyslexia, possibly because these children did not use the verbal cues. Children with dyslexia and children whose dyslexia had been compensated seemed to have difficulty encoding the novel sounds in memory. As a result, they derived less phonological memory advantage and less visual memory interference from the training than did typical readers. Children in the compensated dyslexia group scored lower on sound-symbol training than their age peers. In other respects, the scores of these children were equivalent to those of the typically reading comparison groups. Children in the compensated dyslexia group exhibited higher phonological rehearsal, iconic memory, and associative memory scores than children in the dyslexia group. Implications for the remediation of dyslexia are discussed. 相似文献
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Children (n = 122) and adults (n = 200) with dyslexia completed rapid automatic naming (RAN) letters, rapid automatic switching (RAS) letters and numbers,
executive function (inhibition, verbal fluency), and phonological working memory tasks. Typically developing 3rd (n = 117) and 5th (n = 103) graders completed the RAS task. Instead of analyzing RAN/RAS results the usual way (total time), growth mixture modeling
assessed trajectories of successive times for naming 10 symbols in each of five rows. For all three samples and both RAN and
RAS, two latent classes were identified. The “faster” class performed slowly on the first row and increased time by small increments on subsequent rows. The “slower” latent class performed more slowly on the first row, and children, but not adults, increased time by larger increments on subsequent rows. For children, both the initial row (automaticity index) and slope (sustained controlled processing index)
of the trajectory differentiated the classes. For adults, only the initial row separated the classes. The longest time was
on row 3 for RAN and row 4 for RAS. For the typically developing 5th graders, close in age to the children with dyslexia,
the trajectories were flatter than for children with dyslexia and only the slower class (4%) showed the peak on row 4. For
children with dyslexia, inhibition predicted RAN slope within the slower latent class and phonological working memory predicted
RAS slope for both latent classes. For adults with dyslexia, inhibition and phonological working memory differentiated both
latent classes on RAN intercept and RAS slope. Taken together, RAN, which may assess the phonological loop of working memory,
and RAS, which may assess the central executive in working memory, may explain the timing deficit in dyslexia in sustaining
coordinated orthographic-phonological processing over time.
This research was supported by Grant Ns. P50 33812 and R01 HD25858 from the National Institute of Child Health and Human Development,
Virginia W. Berninger, PI. 相似文献
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相比于阅读正确性,透明文字阅读障碍儿童的阅读流畅性问题更突出。本文用多基线干预性混合实验设计,考察形-音联结和重复阅读两种训练对3~5年级不同水平维吾尔文阅读障碍儿童阅读流畅性的单独和综合干预效果。结果发现:(1)基线时,不同水平阅读障碍儿童的单词阅读正确性和阅读理解成绩不存在显著差异,但在阅读流畅性测验得分上严重阅读障碍儿童显著落后于一般阅读障碍儿童;(2)形-音联结和重复阅读两种训练分别提高了阅读障碍儿童的假词和真词阅读速度,两种训练结合使用时提高了阅读理解成绩,其中严重阅读障碍儿童的阅读理解成绩提高的更明显。 相似文献
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为了探讨汉语阅读困难和普通儿童短时记忆缺陷的原因,本研究从北京13个小学筛选出阅读困难儿童并配以相当数量的正常阅读儿童参加数字、汉字短时记忆及阅读测试。方差分析和分层回归分析表明阅读困难者短时记忆显著落后于普通读者,短时记忆的缺陷存在于记忆容量和提取效率上,且受阅读能力的影响。 相似文献
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P T Ackerman R A Dykman C Holloway N P Paal M Y Gocio 《Journal of learning disabilities》1991,24(9):542-549
Sixty children with dyslexia (41 boys, 19 girls; ages 9 to 13) were enrolled in a 10-week summer tutoring program that emphasized word-building skills. They were randomly and blindly assigned to receive either placebo or piracetam, a purportedly memory-enhancing drug that has been reported to facilitate reading skill acquisition. The children were subtyped as "dysphonetic" or "phonetic" on the basis of scores from tests of phonological sensitivity and phoneme-grapheme correspondence skills. Of the 53 children who completed the program, 37 were classified as dysphonetic and 16 as phonetic. The phonetic group improved significantly more in word-recognition ability than the dysphonetic group. Overall, the children on medication did not improve more than the nonmedicated ones in any aspect of reading. The phonetic subgroup on piracetam gained more in word recognition than any subgroup but did not improve significantly more than the phonetic subgroup on placebo. Results are discussed in relation to findings from previous studies of piracetam in children with dyslexia. 相似文献
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The working memory skills of children with four categories of special educational needs (SEN) were investigated: general learning difficulties, language problems, literacy problems, and attentional and behavioural problems. Children with general learning difficulties performed poorly on measures of all three components of the working memory model: the phonological loop, central executive, and the visuo‐spatial sketchpad. Children with problems specific to language had impairments of the phonological loop and the central executive only. The working memory abilities of the groups with literacy and behavioural problems fell within the normal range. These findings are explained in terms of specific roles played by components of working memory in supporting learning activities. 相似文献
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Susan Gathercole and Susan Pickering, of the Department of Experimental Psychology at the University of Bristol, compared the working memory abilities of children recognised by their schools as having special educational needs with those of children making normal curricular progress. All three components of the working memory model of Baddeley and Hitch (1974) were assessed by administering a working memory test battery when the children were aged seven and eight years. Children recognised as having special educational needs had marked impairments on the working memory measures, and in particular on the tasks tapping the central executive. These findings suggest that poor working memory capacity may be a key feature in unexpected failure to make normal curricular progress, and also indicate the potential utility of working memory assessments in identifying children at risk of low achievement in school in future years. 相似文献
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This study was designed to examine whether the phonetic regularity of a language can significantly influence the prevalence and pattern of developmental dyslexia. Demographically matched samples of fifth-grade children in Italy (N = 448) and the United States (N = 1,278) were evaluated to identify children with specific reading disabilities. Reading disabled children with average intelligence were compared to normal controls on a series of neuropsychological tests to evaluate specific cognitive deficits associated with reading disorders in each country. The findings suggested that (a) dyslexia is more prevalent in the United States than in Italy, (b) reading disabilities are strongly associated with disorders of verbal processing in both countries, although some American dyslexics also show visual-motor deficits, and (c) there is a greater dissociation between reading comprehension and decoding in Italian than in English. 相似文献