汉语语音型阅读障碍儿童的范畴知觉技能

选取汉语中存在语音意识缺陷的阅读障碍儿童、正常儿童和成人各25名为被试,考察了语音型阅读障碍儿童是否存在言语知觉缺陷.言语知觉任务采用范畴知觉范式,要求被试识别合成或自然的语音范畴连续体.结果发现语音型阅读障碍儿童识别合成和自然的刺激都表现出范畴知觉缺陷,对范畴内刺激的识别缺少一致性;个体分析表明大部分语音型阅读障碍儿童有较低的识别函数斜率;回归分析表明言语知觉技能通过语音意识的中介作用于阅读能力的发展.     

阅读发展相关的认知技能：汉语和英语的比较

对英语和汉语阅读获得所需要的认知技能及发展性阅读障碍儿童认知缺陷的研究进行了回顾。分析表明阅读发展所需认知资源表现出了跨语言的一致性,都要求有充足的学习与记忆能力和正常的视觉正字法技能,语音和语义知识表征足够精细;阅读障碍儿童的主要认知缺陷也表现出了跨文字的一致性,都包括语音缺陷和一般的学习与记忆问题。然而儿童所面临的语言文字特性会影响到阅读技能获得的难易和发展性阅读障碍的表现     

阅读障碍儿童语音提取

儿童在提取短时记忆系统的语音信息时,往往会造成部分信息的丢失和回忆量的下降,这种信息丢失量的多少与中央执行系统功能有着密切的联系。为了考察阅读障碍儿童的语音提取特点,挖掘他们记忆失败的本质,使用自由回忆和再认两种任务,考察阅读障碍儿童在无意义音节和汉语词汇上的提取特点,结果发现：（1）阅读障碍儿童在语音提取时,丢失的信息率要显著多于正常儿童,这种丢失可能是由于他们落后的中央执行功能所致;（2）阅读障碍儿童单纯的语音保持能力正常,但不擅长利用语义编码来促进短时记忆效果,而正常儿童却能够较好地利用语义线索。     

汉语发展性阅读障碍儿童的视知觉学习*

研究采用知觉学习经典范式中的视觉搜索任务探讨汉语发展性阅读障碍儿童的知觉学习过程。研究考察了阅读障碍儿童与正常儿童在简单搜索任务、复杂搜索任务和限制时间的复杂搜索任务上的知觉学习特点。结果发现,阅读障碍儿童在复杂搜索任务中初始搜索时间显著长于正常控制组;在限制时间的复杂搜索任务中更进一步发现阅读障碍儿童的反应正确率显著低于正常控制组儿童;而且两组儿童视觉搜索任务的正确率与汉语阅读的识字量成绩存在显著相关。上述结果表明,汉语发展性阅读障碍儿童存在复杂搜索的知觉学习缺陷,这种缺陷可能在某种程度上与儿童的阅读技能发展有关。     

联结竞争对听写困难儿童形音联结编码的影响

听写困难是一种发生率较高的儿童学习障碍现象。听写困难的认知机制,主要包括语音加工缺陷、字形表征缺陷以及形音联结编码缺陷。本研究通过两个实验,考察了整字语音竞争和部件语音竞争,对听写困难儿童形音联结编码的影响。结果发现,在不同条件下,听写困难儿童的形音联结水平都落后于正常儿童;整字语音竞争显著干扰了正常儿童的形音联结编码,但对听写困难儿童的影响并不明显;与之相反的是,部件语音竞争对听写困难儿童的干扰更为明显。研究结果支持听写困难儿童的形音联结编码缺陷理论。在此基础上,听写困难儿童的形音联结较少受到整字语音的竞争干扰,但更容易受到部件语音的竞争干扰,这可能是因为,他(她)们的整体字形加工或表征存在缺陷,导致原生字字形和语音信息难以被激活,以及合体字的部件信息得到更多的加工所致。     

汉语阅读障碍的语音加工及正字法加工缺陷的实验研究

本研究对汉语阅读障碍的加工缺陷进行探讨,期望有助于揭示语言加工的普遍性与特殊性,以及阅读障碍的成因,并可为后期的干预提供帮助。研究采用改编的言语认知测验对阅读水平匹配组与阅读障碍组和生理年龄匹配组进行比较后发现,阅读障碍组在语音意识和正字法加工任务上的成绩均明显差于生理年龄控制组和阅读水平匹配组;阅读障碍组在快速命名和语音记忆任务上的成绩不如生理年龄匹配组,仅达到阅读水平匹配组水平。因此,汉语发展性阅读障碍儿童存在语音意识和正字法加工缺陷,这两种缺陷可能是阅读障碍儿童面临的最主要的两大缺陷;阅读障碍儿童在快速命名和语音记忆上的不足可能是发展迟滞所致。同时,大多数的汉语阅读障碍儿童存在不止一种的认知缺陷。阅读障碍儿童在语音意识和正字法加工上存在缺陷的比例最高。     

汉语发展性阅读障碍儿童视觉同时性加工技能子成分的发展及其与阅读的关系

通过分别以高频汉字(实验1)和图形非言语材料(实验2)为刺激的两个联合视觉注意任务, 并采用基于Budensen视觉注意理论的参数估计方法, 系统地探查小学三~六年级汉语发展性阅读障碍儿童的视觉同时性加工技能缺陷的内在机制。以43名汉语发展性阅读障碍儿童和46名生理年龄匹配典型发展儿童为被试, 每类被试均被分为小学中年级组(三、四年级)和高年级组(五、六年级)。两个实验均发现不同年级组的阅读障碍儿童在知觉加工速度参数上显著小于控制组儿童。在空间注意分布权重参数上, 实验1的结果显示, 不同于控制组儿童向左侧化发展的注意分布模式, 两个年级组的阅读障碍儿童均表现为无偏的注意分布; 而实验2未发现显著组别差异。且这两种同时性加工子技能分别与不同水平的汉语阅读技能密切相关。结果表明, 汉语阅读障碍儿童在同时加工多个视觉刺激时存在持续的知觉加工速度缓慢的问题, 在同时加工言语类刺激时还表现出异常的空间注意分布模式。本研究有助于从基础认知层面揭示汉语发展性阅读障碍儿童的缺陷机理, 为进一步设计相关的提高阅读效率的干预方案提供理论依据。     

汉语发展性阅读障碍儿童视觉注意广度的发展及其对阅读流畅性的作用

以85名小学2~6年级儿童为研究对象,采用方差分析、分层回归探讨小学高、低年龄阶段发展性阅读障碍儿童视觉注意广度的发展变化,并以同年龄正常阅读者作为对照组;同时在不同年龄阶段探究视觉注意广度对阅读流畅性发展的预测作用。结果显示：（1）发展性阅读障碍儿童存在视觉注意广度缺陷,并呈现出在小学高年龄阶段更严重的趋势;（2）在阅读障碍儿童中,视觉注意广度对汉语流畅阅读的显著预测作用随发展增强;而对于正常阅读者,视觉注意广度仅显著预测低年龄段学生的句子朗读流畅阅读能力。以上结果表明视觉注意广度与汉语流畅阅读能力关系密切,今后汉语阅读障碍的相关干预研究可以尝试从视觉注意广度训练方面切入。     

汉语发展性阅读障碍儿童心理机制的初步研究

本研究采用真假字判断与同音判断任务考察了汉语发展性阅读障碍儿童的心理机制。结果显示,对于真假字判断任务,阅读障碍儿童与正常儿童没有显著差异,而在同音判断任务中表现出了显著差异。本研究说明汉语阅读障碍儿童在整体字形表征方面是正常的,同时还支持了阅读障碍为语音表征缺陷的观点。     

阅读障碍儿童的语言特异性认知缺陷

以41名五六年级的阅读障碍儿童和41名正常儿童为研究对象,系统考察了语言认知能力和一般认知能力与阅读成绩之问的关系.结果发现,障碍儿童在所有的语言认知测验中显著落后于正常儿童,较高比率的儿童存在能力缺陷.而在非语言特异性的一般认知能力测验中,未发现两组存在显著差异的证据,这意味着阅读障碍儿童的认知能力缺陷主要集中在语言认知领域.     

The effects of the constancy of location and order in working memory visual–phonological binding of children with dyslexia

It has been suggested that children with dyslexia have difficulties in visual–phonological working memory (WM) binding, supporting the hypothesis that this ability is crucial in the formation of associations between written forms and phonological codes required by reading. However, research on this topic is currently scarce and has not clarified to what extent binding may be supported by spatial and temporal information. The present study examined visual–phonological WM binding performance in a group of children with dyslexia compared to a control group of typically developing children matched for age, gender, and grade. Children had to memorize ephemeral associations between meaningless shapes and nonwords, with stimuli presented in either fixed or variable spatial locations, and in either fixed or variable temporal order across trials; performance was assessed using a recognition task. Results showed that children with dyslexia have a deficit in visual–phonological WM binding in every presentation condition and that, unlike control children, they are not able to use fixed spatial locations as an aid to bind information. Crucially, however, children with dyslexia still benefit from the presentation of stimuli in a fixed temporal order. These findings support the hypothesis that a WM binding deficit is crucial in children with dyslexia, and have potential implications for treatment strategies.     

Modelling relations between sensory processing, speech perception, orthographic and phonological ability, and literacy achievement

The general magnocellular theory postulates that dyslexia is the consequence of a multimodal deficit in the processing of transient and dynamic stimuli. In the auditory modality, this deficit has been hypothesized to interfere with accurate speech perception, and subsequently disrupt the development of phonological and later reading and spelling skills. In the visual modality, an analogous problem might interfere with literacy development by affecting orthographic skills. In this prospective longitudinal study, we tested dynamic auditory and visual processing, speech-in-noise perception, phonological ability and orthographic ability in 62 five-year-old preschool children. Predictive relations towards first grade reading and spelling measures were explored and the validity of the global magnocellular model was evaluated using causal path analysis. In particular, we demonstrated that dynamic auditory processing was related to speech perception, which itself was related to phonological awareness. Similarly, dynamic visual processing was related to orthographic ability. Subsequently, phonological awareness, orthographic ability and verbal short-term memory were unique predictors of reading and spelling development.     

A developmental phonological short-term memory deficit: a case study

A developmental case of phonological short-term memory deficit was studied in a highly educated subject. The subject, BS, who had obtained a Ph.D. in molecular biology, demonstrated striking deficits on some short-term memory tasks, particularly for auditorily presented nonword lists. With visual presentation and with meaningful words, he often scored at a normal level. The results indicate a deficit in retaining phonological information but an ability to use visual, lexical, and semantic information to boost recall. Despite this phonological short-term memory deficit, BS scored at a normal level on a syntactic comprehension test and on reading of nonwords. He was impaired, however, on repeated list learning, learning of foreign vocabulary, and transcribing dictated materials. The implications of these results for models of short-term memory and the uses of phonological retention in cognitive processing are discussed.     

不同编码对听写困难儿童字形记忆的促进效应

听写困难是一种发生率较高的儿童学习障碍现象。实验考察笔画语音编码和动作编码对听写困难儿童字形记忆水平的影响。结果发现, 笔画语音编码对听写困难儿童的字形记忆成绩没有明显影响, 但却明显促进了正常儿童的字形记忆成绩; 与之相对, 动作编码对正常儿童的字形记忆成绩没有明显影响, 但却明显促进了听写困难儿童的字形记忆成绩。上述现象, 既可能源于编码加工阶段, 也可能源于字形表征的提取阶段。     

Working memory deficits in boys with attention deficit/hyperactivity disorder (ADHD): An examination of orthographic coding and episodic buffer processes

The episodic buffer component of working memory was examined in children with attention deficit/hyperactivity disorder (ADHD) and typically developing peers (TD). Thirty-two children (ADHD = 16, TD = 16) completed three versions of a phonological working memory task that varied with regard to stimulus presentation modality (auditory, visual, or dual auditory and visual), as well as a visuospatial task. Children with ADHD experienced the largest magnitude working memory deficits when phonological stimuli were presented via a unimodal, auditory format. Their performance improved during visual and dual modality conditions but remained significantly below the performance of children in the TD group. In contrast, the TD group did not exhibit performance differences between the auditory- and visual-phonological conditions but recalled significantly more stimuli during the dual-phonological condition. Furthermore, relative to TD children, children with ADHD recalled disproportionately fewer phonological stimuli as set sizes increased, regardless of presentation modality. Finally, an examination of working memory components indicated that the largest magnitude between-group difference was associated with the central executive. Collectively, these findings suggest that ADHD-related working memory deficits reflect a combination of impaired central executive and phonological storage/rehearsal processes, as well as an impaired ability to benefit from bound multimodal information processed by the episodic buffer.     

语音记忆和中央执行功能在不同年级儿童解码和语言理解中的作用

选取256名三~六年级儿童, 采用相关分析、结构方程模型等方法考察了语音记忆和中央执行功能在不同年级儿童的解码和语言理解中的作用。结果显示, 在低年级阶段, 语音记忆和刷新对解码存在显著预测作用, 转换和刷新对语言理解存在显著预测作用; 在高年级阶段, 只有刷新对解码保持着稳定的预测作用。这表明, 语音记忆和中央执行功能对儿童的解码和语言理解存在不同的影响, 并且这种影响会随着年级的增长发生变化。     

How is phonological processing related to individual differences in children’s arithmetic skills?

While there is evidence for an association between the development of reading and arithmetic, the precise locus of this relationship remains to be determined. Findings from cognitive neuroscience research that point to shared neural correlates for phonological processing and arithmetic as well as recent behavioral evidence led to the present hypothesis that there exists a highly specific association between phonological awareness and single‐digit arithmetic with relatively small problem sizes. The present study examined this association in 37 typically developing fourth and fifth grade children. Regression analyses revealed that phonological awareness was specifically and uniquely related to arithmetic problems with a small but not large problem size. Further analysis indicated that problems with a high probability of being solved by retrieval, but not those typically associated with procedural problem‐solving strategies, are correlated with phonological awareness. The specific association between phonological awareness and arithmetic problems with a small problem size and those for which a retrieval strategy is most common was maintained even after controlling for general reading ability and phonological short‐term memory. The present findings indicate that the quality of children’s long‐term phonological representations mediates individual differences in single‐digit arithmetic, suggesting that more distinct long‐term phonological representations are related to more efficient arithmetic fact retrieval.     

Working memory deficit in children with mathematical difficulties: a general or specific deficit?

This study examined whether children with mathematical difficulties (MDs) or comorbid mathematical and reading difficulties have a working memory deficit and whether the hypothesized working memory deficit includes the whole working memory system or only specific components. In the study, 31 10-year-olds with MDs and 37 10-year-olds with both mathematical and reading difficulties were compared with 47 age-matched and 50 younger controls (9-year-olds) on a number of working memory tasks. Compared with the age-matched controls, both groups of children with MDs performed worse on tasks tapping the central executive (e.g., visual matrix span) and the phonological loop (e.g., word span). More important, the MD group performed worse than the younger controls on the counting span task, whereas the group with comorbid mathematical and reading difficulties performed worse on the counting span task and the visual matrix span task. These findings provide support for the assumption that children with MDs have a working memory deficit. More specifically, children with MDs have a central executive deficit connected to concurrent processing and storage of numerical and visual information.