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121.
Psychophysical studies have identified two distinct limitations of visual attention capacity: processing speed and apprehension span. Using a simple test, these cognitive factors can be analyzed by Bundesen's Theory of Visual Attention (TVA). The method has strong specificity and sensitivity, and measurements are highly reliable. As the method is theoretically founded, it also has high validity. TVA-based assessment has recently been used to investigate a broad range of neuropsychological and neurological conditions. We present the method, including the experimental paradigm and practical guidelines to patient testing, and review existing TVA-based patient studies organized by lesion anatomy. Lesions in three anatomical regions affect visual capacity: The parietal lobes, frontal cortex and basal ganglia, and extrastriate cortex. Visual capacity thus depends on large, bilaterally distributed anatomical networks that include several regions outside the visual system. The two visual capacity parameters are functionally separable, but seem to rely on largely overlapping brain areas. 相似文献
122.
This study examined whether training using a nonverbal auditory-visual matching task had a remedial effect on reading skills in developmental dyslexia. The pretest/post-test design was used with Swedish children ( N = 41), between the ages of 7 and 12. Training comprised twice-weekly sessions of 15 minutes, over eight weeks. There was an improvement in auditory-visual matching during the training period. There were also improvements in some reading test scores, especially in reading nonsense words and in reading speed. These improvements in tasks which are thought to rely on phonological processing suggest that such reading difficulties in dyslexia may stem in part from more basic perceptual difficulties, including those required to manage the visual and auditory components of the decoding task. The utility of the concept of auditory structuring is discussed in relation to auditory and phonological processing skills when a child learns to read. 相似文献
123.
Karin Landerl Barbara Fussenegger Edith Willburger 《Journal of experimental child psychology》2009,103(3):309-324
This study tests the hypothesis that dyslexia and dyscalculia are associated with two largely independent cognitive deficits, namely a phonological deficit in the case of dyslexia and a deficit in the number module in the case of dyscalculia. In four groups of 8- to 10-year-olds (42 control, 21 dyslexic, 20 dyscalculic, and 26 dyslexic/dyscalculic), phonological awareness, phonological and visual-spatial short-term and working memory, naming speed, and basic number processing skills were assessed. A phonological deficit was found for both dyslexic groups, irrespective of additional arithmetic deficits, but not for the dyscalculia-only group. In contrast, deficits in processing of symbolic and nonsymbolic magnitudes were observed in both groups of dyscalculic children, irrespective of additional reading difficulties, but not in the dyslexia-only group. Cognitive deficits in the comorbid dyslexia/dyscalculia group were additive; that is, they resulted from the combination of two learning disorders. These findings suggest that dyslexia and dyscalculia have separable cognitive profiles, namely a phonological deficit in the case of dyslexia and a deficient number module in the case of dyscalculia. 相似文献
124.
纵向再探学前儿童心理理论发展模式 总被引:3,自引:0,他引:3
本文作者前不久完成的一项横断设计研究中, 以自编的心理理论量表测查比较了中美两国3~5岁儿童的有关发展。量表包括五项任务: (1) 不同的愿望; (2) 知与不知; (3) 不同的信念; (4) 内容错误信念和 (5) 伪装的情绪。研究发现两种不同文化群体儿童对上述任务的理解均表现出稳定一致的发展次序, 两者的次序大致相同但具有重要差别: 我国儿童的理解次序如从易到难排列如上所列, 这一次序与美国儿童的差别在于我国儿童先理解“知与不知”, 然后是“不同的信念”, 而美国儿童则恰好相反。这一研究结果对了解不同文化儿童心理理论的发展次序是十分有意义的, 但问题是经由横断设计的量表研究所确立的发展次序能否准确地描述个体儿童的纵向进展呢? 为此本研究使用了相同的测量工具对参加过横断研究的北京3岁儿童(时间1)在他们4岁(时间2)和5岁(时间3)时进行了焦点追踪研究。研究结果表明, 随着测查时间的 延伸, 个体儿童的作业成绩不仅逐步提高, 而且这种提高符合量表任务的发展次序。通过应用格特曼(Guttman)和雷氏(Rasch)测量模型对这一结果的分析, 再一次证实我国个体儿童的有关发展次序与欧美文化儿童的发展次序大致相同并且有重要的差别。本研究的结果不仅能为横断研究中个别差异的研究提供有用的工具, 而且深化了人们对心理理论发展机制的认识, 即把心理理论的发展看作是在一定的文化环境影响下不断扩展和深化的概念建构过程。但对这一推论仍有待进一步证实。 相似文献
125.
126.
Janean E. Dilworth‐Bart Ayesha Khurshid Deborah Lowe Vandell 《Infant and child development》2007,16(5):525-552
Using Ecological Systems Theory and stage sequential modelling procedures for detecting mediation, this study examined how early developmental contexts impact preschoolers' performances on a measure of sustained attention and impulse control. Data from 1273 European‐American and African‐American participants in the NICHD Study of Early Child Care were used to identify the potential mediators of the relation between early household income‐to‐need (INR) and 54‐month impulsivity and inattention. Exploratory analyses were also conducted to determine whether the relationships between early income, home environment, parenting stress, and the outcome variables differ for African‐American versus European‐American‐American children. We found modest support for the study hypothesis that 36‐month home environment quality mediated the INR/attention relationship. INR accounted for more home environment score variance and home environment accounted for more Impulsivity score variance for African‐American children. Home environments were related to inattention in the European‐American, but not African‐American, group. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献
127.
128.
3~5岁幼儿自我延迟满足的发展特点及其中澳跨文化比较 总被引:19,自引:1,他引:18
采用实验室实验和情境观察相结合的方法,考察了我国3~5岁幼儿自我延迟满足发展的特点及中澳幼儿自我延迟满足的跨文化差异。研究结果表明:(1) 3~5岁幼儿自我延迟满足平均延迟时间随年龄增长而延长;3岁幼儿使用延迟策略少,4岁幼儿主要使用寻求策略,5岁幼儿主要使用寻求策略和自我分心、问题解决策略,自我言语控制策略在整个幼儿期始终不具有显著优势性。(2) 澳大利亚幼儿自我延迟满足发展水平高于我国同龄幼儿;在延迟策略选择上中澳幼儿既具有差异性,又具有一定的相似性;文化价值观通过教育影响着幼儿自我延迟满足的发展。 相似文献
129.
汉语发展性阅读障碍亚类型的初步探讨 总被引:12,自引:0,他引:12
以阅读水平匹配组为参照对29名汉语发展性阅读障碍儿童的认知缺陷模式进行了分析,并考察了不同亚类型阅读障碍儿童的汉字识别模式。结果表明汉语发展性阅读障碍存在不同的亚类型,以语音缺陷型、快速命名缺陷型及两者结合的双重缺陷型为主,与英语国家研究中的双重缺陷假设一致。语音缺陷型儿童汉字识别时有更多的语义错误,对声旁中的部分语音线索不敏感;快速命名缺陷型儿童汉字识别时依赖声旁语音线索,表现出阅读发展的一般延迟;双重或多重认知缺陷型是阅读损伤最严重的亚类型 相似文献
130.
阅读过程中眼动特征的发展研究 总被引:1,自引:0,他引:1
对国内外有关阅读过程中眼动特征的发展研究进行了综述。国外在该领域的研究大致经历了三个阶段,而国内的有关研究虽然起步较晚,但却取得了不少研究成果,对相关内各进行了扼要的介绍,最后作者对阅读过程眼动特征的发展研究发表了自己的看法。 相似文献