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1.
There is a growing body of evidence that children with dyslexia have problems not just in reading but in a range of skills
including several unrelated to reading. In an attempt to compare the severity and incidence of deficits across these varied
domains, children with dyslexia (mean ages 8, 12, and 16 years), and control groups of normally achieving children matched
for IQ and for age or reading age, were tested on a range of primitive (basic) skills. The children with dyslexia performed
significantly worse than the same-age controls on most tasks, and significantly worse even than the reading-age controls on
phoneme segmentation, picture naming speed, word tachistoscopic word recognition, speeded bead threading and some balance
tasks. The overall performance of the children with dyslexia is interpreted as showing less complete automatization than normal. 相似文献
2.
Edith Willburger Barbara Fussenegger Kristina Moll Guilherme Wood Karin Landerl 《Learning and individual differences》2008,18(2):224-236
In four carefully selected samples of 8- to 10-year old children with dyslexia (but age adequate arithmetic skills), dyscalculia (but age adequate reading skills), dyslexia/dyscalculia and controls a domain-general deficit in rapid automatized naming (RAN) was found for both dyslexia groups. Dyscalculic children exhibited a domain-specific deficit in rapid naming of quantities. This finding is in line with recent assumptions that dyscalculia is associated with a neurobiological deficit in the processing of numerosities. In the dyslexia/dyscalculia group, RAN deficits were additive, that is, the dyslexia/dyscalculia group exhibited the sum of the deficits found in the dyslexia only and dyscalculia only groups. This finding suggests that the cognitive bases of dyslexia and dyscalculia are independent from each other. Within the naming speed paradigm no differential impact of special demands on the executive functions inhibition and shifting was found for any of the four groups. 相似文献
3.
Hsiao-Lan Sharon Wang Martina Huss Jarmo A. H?m?l?inen Usha Goswami 《Reading and writing》2012,25(2):509-536
The present study explores the relationship between basic auditory processing of sound rise time, frequency, duration and
intensity, phonological skills (onset-rime and tone awareness, sound blending, RAN, and phonological memory) and reading disability
in Chinese. A series of psychometric, literacy, phonological, auditory, and character processing tasks were given to 73 native
speakers of Mandarin with an average age of 9.7 years. Twenty-six children had developmental dyslexia, 29 were chronological
age-matched controls (CA controls) and 18 were reading-matched controls (RL controls). Chinese children with dyslexia were
significantly poorer than CA controls in almost all phonological tasks, in semantic radical search, and in phonological recoding
proficiency. Chinese children with dyslexia also showed significant impairments in most of the basic auditory processing tasks.
Regression analyses demonstrated that different auditory measures of rise time discrimination were the strongest predictors
of individual differences in Chinese character reading (1 Rise task) and phonological recoding (2 Rise task) respectively,
with frequency discrimination also important for nonsense syllable decoding. Our results support the hypothesis that accurate
perception of the amplitude envelope of speech is critical for phonological development and consequently reading acquisition
across languages. 相似文献
4.
Insufficient knowledge of the subtle relations between words’ spellings and their phonology is widely held to be the primary limitation in developmental dyslexia. In the present study the influence of phonology on a semantic-based reading task was compared for groups of readers with and without dyslexia. As many studies have shown, skilled readers make phonology-based false-positive errors to homophones and pseudohomophones in the semantic categorization task. The basic finding was extended to children, teens, and adults with dyslexia from familial and clinically-referred samples. Dyslexics showed the same overall pattern of phonology errors and the results were consistent across dyslexia samples, across age groups, and across experimental conditions using word and nonword homophone foils. The dyslexic groups differed from chronological-age matched controls by having elevated false-positive homophone error rates overall, and weaker effects of baseword frequency. Children with dyslexia also made more false-positive errors to spelling control foils. These findings suggest that individuals with dyslexia make use of phonology when making semantic decisions both to word homophone and non-word pseudohomophone foils and that dyslexics lack adequate knowledge of actual word spellings, compared to chronological-age and reading-level matched control participants. 相似文献
5.
The purpose of the present study was twofold: (a) to examine the extent to which Chinese dyslexic children experience deficits in phonological and orthographic processing skills and (b) to examine if Chinese dyslexia is associated with deficits in Planning, Attention, Simultaneous, and Successive (PASS) processing. A total of 27 Grade 4 children with dyslexia (DYS), 27 Grade 4 chronological age (CA) controls, and 27 Grade 2 reading age (RA) controls were tested on measures of phonological awareness, rapid naming, phonological memory, PASS, reading accuracy, and reading fluency. The results indicated that the DYS group performed significantly poorer than the CA and RA groups on both measures of phonological awareness and on a measure of orthographic processing but comparably to the RA group on a measure of rapid naming and both measures of phonological memory. In regard to the PASS processing skills, the DYS group performed worse than the CA controls on Successive and Simultaneous processing but comparably to the RA group on all PASS processing skills. Implications of these findings for early identification and intervention of reading difficulties are discussed. 相似文献
6.
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
7.
Regularisation of nonwords in dyslexia: contributions of visual orthographic and phonological onsets
This study investigated the contributions of visual orthographic (analogy) and phonological processes in mediating nonword reading in children with dyslexia. Three groups of primary school age children (n=15 in each group) were recruited. The first group were children with dyslexia (mean age 11 years 3 months, mean reading age 8 years 3 months), the second group were chronological age controls (mean age 11 years 3 months, mean reading age 11 years 8 months) and the third group were reading age matched controls (mean age 7 years 11 months, mean reading age 8 years 3 months). All participants were required to read aloud a list of nonwords. Nonwords in the list were derived from paired regular and irregular keywords in which onsets were manipulated to be either phonologically or visually similar to keyword onsets. ANOVAs revealed firstly that children with dyslexia were the least likely to regularise nonword pronunciation and secondly, that all groups displayed an overall preference for words that were phonologically manipulated. These findings have been interpreted within the context of dual‐route theory. 相似文献
8.
9.
Inflectional morphology and dyslexia: Italian children’s performance in a nonword pluralization task
Maria Vender Federica Mantione Silvia Savazzi Denis Delfitto Chiara Melloni 《Annals of dyslexia》2017,67(3):401-426
In this study, we present the results of an original experimental protocol designed to assess the performance in a pluralization task of 52 Italian children divided into two groups: 24 children with developmental dyslexia (mean age 10.0 years old) and 28 typically developing children (mean age 9.11 years old). Our task, inspired by Berko’s Wug Test, had the aim of testing the subjects’ ability to apply pluralization rules to nonwords in the morphologically complex context of Italian nominal inflection. Results demonstrate that dyslexics display poorer morphological skills in comparison to controls, showing lower accuracy in the task. Furthermore, the dissimilar performances reported by the subjects in the different conditions indicate that the ability to inflect nonwords depends on factors such as the rule’s productivity, frequency, and opacity with respect to gender. Finally, the children’s performance in this task was significantly related to their reading proficiency, and it could predict accuracy in word reading independently of phonological awareness and working memory. 相似文献
10.
Evidence suggests that sensitivity to coherent motion (CM) is related to reading, but its role in the etiology of developmental dyslexia remains unclear. In this longitudinal study, CM sensitivity was measured in 31 children at family risk for dyslexia and 31 low-risk controls. Children, diagnosed with dyslexia in third grade (mean age=8 years 3 months), demonstrated reduced CM sensitivity in kindergarten (mean age=5 years 8 months), before they had learned to read. Preschool CM thresholds in controls also uniquely predicted future literacy achievement. When reassessed in first grade, CM sensitivity in the dyslexic children was age appropriate, and CM thresholds in the controls no longer predicted literacy acquisition. These findings contribute to the debate about the developmental relations between visual processing and reading acquisition. 相似文献
11.
L S Siegel 《Journal of learning disabilities》1992,25(10):618-629
The purpose of this study was to determine whether children with dyslexia, that is, children whose reading levels were significantly lower than would be predicted by their IQ scores, constituted a distinctive group when compared with poor readers, that is, children whose reading scores were consistent with their IQ scores. The performance of children with dyslexia, poor readers, and normally achieving readers was compared on a variety of reading, spelling, phonological processing, language, and memory tasks. Although the children with dyslexia had significantly higher IQ scores than the poor readers, these two groups did not differ in their performance on reading, spelling, phonological processing, or most of the language and memory tasks. In all cases, the performance of both reading disabled groups was significantly below that of nondisabled readers. The findings were similar whether absolute difference or regression scores were used. Reading disabled children, whether or not their reading is significantly below the level predicted by their IQ scores, experience significant problems in phonological processing, short-term and working memory, and syntactic awareness. On the basis of these data, there does not seem to be a need to differentiate between individuals with dyslexia and poor readers. Both of these groups are reading disabled and have deficits in phonological processing, verbal memory, and syntactic awareness. 相似文献
12.
This paper reports two studies investigating the nature of comprehension deficits in a group of 7–8 year old children whose decoding skills are normal, but whose reading comprehension skills are poor. The performance of these poor comprehenders was compared to two control groups, Chronological-Age controls and Comprehension-Age controls. The first study examined whether these comprehension difficulties are specific to reading. On two measures of listening comprehension the poor comprehenders were found to perform at a significantly lower level than Chronological-Age controls. However, they did not differ from a group of younger children matched for reading comprehension skills. This indicates that the observed comprehension difficulties are not restricted to reading, but rather represent a general comprehension limitation. The second study investigated whether these comprehension difficulties can be explained in terms of a memory deficit. The short-term and working memory skills of these three groups were examined. The poor comprehenders did not differ from their Chronological-Age controls on either of these tasks. In conclusion, it is argued that working memory processes are not a major causal factor in the creation of the comprehension difficulties identified in the present group of poor comprehenders. 相似文献
13.
Alice L. R. Spooner Susan E. Gathercole Alan D. Baddeley 《Journal of Research in Reading》2006,29(2):173-193
Seven‐ and eight‐year‐old skilled and less‐skilled comprehenders were compared on a sentence recognition task in two conditions varying in memory load and retention interval. Integration of story information during comprehension was indexed by inflated recognition errors of foils that had been constructed by integrating information across original story sentences. Skilled comprehenders exhibited more accurate memory for sentences than less‐skilled comprehenders. However, the groups did not differ in the degree to which they integrated information with minimal memory demand, or in their tendency to integrate information and retain the integrated representations with increased memory demand. These results were interpreted as evidence that integration deficits do not lie at the root of reading comprehension difficulties in mainstream children. 相似文献
14.
Repetition priming was used to examine whether children with dyslexia bias a lexical–semantic pathway when reading words aloud. For the dyslexic group (n = 18, age 9.4–11.8 years), but not for age‐matched controls (n = 18, age 9.2–12.4 years), reaction times when naming pictures were faster after naming the corresponding word. A reading age‐matched control group (n = 24, age 6.8–8.9 years) showed similar priming effects to the children with dyslexia. The magnitude of repetition priming was greater for children with dyslexia with poor nonword reading and slower picture naming. Assuming repetition priming of picture naming is contingent on accessing lexical phonology via semantics, the results suggest less‐skilled normal and disordered readers show a stronger bias towards a lexical– semantic pathway during word reading than skilled readers, and the severity of the phonological representations deficit modulates the strength of that bias in children with dyslexia. 相似文献
15.
Native Arabic speakers read in a language variety that is different from the one they use for everyday speech. The aim of the present study was: (1) to examine Spoken Arabic (SpA) and Standard Arabic (StA) voweled and unvoweled word reading among native-speaking sixth graders with developmental dyslexia; and (2) to determine whether SpA reading ability among children with dyslexia predicts StA reading fluency in the two orthographies: voweled and unvoweled. A comparison was made to three age groups of typically developing children: a group matched by chronological age, a group of children who are two years younger, and a group of children who are 4 years younger. Findings show that diglossia has a strong impact on reading ability in dyslexic children. Moreover, vowelization plays a pivotal role in the reading ability of Arabic-speaking children with dyslexia in both SpA and StA. This role is evident in the different performance patterns of dyslexic participants as compared with controls on word-reading accuracy and fluency for SpA versus StA. Finally, StA word-reading fluency appears to depend on and to be reliably and powerfully predicted by SpA word-level reading ability. These results underscore the role of diglossia and vowelization in the manifestation of dyslexia in Arabic-speaking children. 相似文献
16.
Anita M.-Y. Wong Connie S.-H. Ho Terry K.-F. Au Catherine McBride Ashley K.-H. Ng Lesley P.-W. Yip Catherine C.-C. Lam 《Reading and writing》2017,30(2):337-361
This study examined (1) whether working memory and higher-level languages skills—inferencing and comprehension monitoring—accounted for individual differences among Chinese children in Chinese reading comprehension, after controlling for age, Chinese word reading and oral language skills, and (2) whether children with specific language impairment (SLI) or dyslexia showed deficits in these skills. Eighty-two Cantonese Chinese-speaking children between the age of 7; 8–9; 5 were assessed. Regression analyses on the full sample offered support for the first question. The children were also classified into four groups: Typically-developing (TD; N = 34), specific language impairment-only (SLI-only; N = 18), SLI-dyslexia comorbid (SLI-D; N = 22) and dyslexia-only (D-only; N = 8). Pair-wise comparisons focusing on the second question revealed that both the SLI-only and the D-only group performed worse than the TD group in reading comprehension after controlling for age and nonverbal intelligence. The SLI-only and the D-only group showed a different profile of deficits: only the SLI-only group performed worse than the TD group in working memory, comprehension monitoring, and inferencing. The SLI-D comorbid group did worse than the SLI-only, but not the D-only group, in reading comprehension. The SLI-D comorbid group did not do worse than either single diagnosis group in the higher-level language skills associated with reading comprehension. These findings suggested adopting different intervention approaches for reading comprehension difficulties in children with SLI versus children with dyslexia. 相似文献
17.
Margaret J. Snowling Hannah M. Nash Debbie C. Gooch Marianna E. Hayiou-Thomas Charles Hulme Wellcome Language Reading Project Team 《Child development》2019,90(5):e548-e564
We followed children at family risk of dyslexia and children with preschool language difficulties from age 3½, comparing them with controls (N = 234). At age 8, children were classified as having dyslexia or Developmental Language Disorder (DLD) and compared at earlier time points with controls. Children with dyslexia have specific difficulties with phonology and emergent reading skills in the preschool period, whereas children with DLD, with or without dyslexia, show a wider range of impairments including significant problems with executive and motor tasks. For children with both dyslexia and DLD, difficulties with phonology are generally more severe than those observed in children with dyslexia or DLD alone. Findings confirm that poor phonology is the major cognitive risk factor for dyslexia. 相似文献
18.
Bouton S Bertoncini J Serniclaes W Colé P 《Journal of deaf studies and deaf education》2011,16(4):458-473
We assessed the reading and reading-related skills (phonemic awareness and phonological short-term memory) of deaf children fitted with cochlear implants (CI), either exposed to cued speech early (before 2 years old) (CS+) or never (CS-). Their performance was compared to that of 2 hearing control groups, 1 matched for reading level (RL), and 1 matched for chronological age (CA). Phonemic awareness and phonological short-term memory were assessed respectively through a phonemic similarity judgment task and through a word span task measuring phonological similarity effects. To assess the use of sublexical and lexical reading procedures, children read pseudowords and irregular words aloud. Results showed that cued speech improved performance on both the phonemic awareness and the reading tasks but not on the phonological short-term memory task. In phonemic awareness and reading, CS+ children obtained accuracy and rapidity scores similar to CA controls, whereas CS- children obtained lower scores than hearing controls. Nevertheless, in phonological short-term memory task, the phonological similarity effect of both CI groups was similar. Overall, these results support the use of cued speech to improve phonemic awareness and reading skills in CI children. 相似文献
19.
This longitudinal study focused on the effects of two different principles of intervention in children at risk of developing dyslexia from 5 to 8 years old. The children were selected on the basis of a background questionnaire given to parents and preschool teachers, with cognitive and functional magnetic resonance imaging results substantiating group differences in neuropsychological processes associated with phonology, orthography, and phoneme-grapheme correspondence (i.e., alphabetic principle). The two principles of intervention were bottom-up (BU), "from sound to meaning", and top-down (TD), "from meaning to sound." Thus, four subgroups were established: risk/BU, risk/TD, control/BU, and control/TD. Computer-based training took place for 2 months every spring, and cognitive assessments were performed each fall of the project period. Measures of preliteracy skills for reading and spelling were phonological awareness, working memory, verbal learning, and letter knowledge. Literacy skills were assessed by word reading and spelling. At project end the control group scored significantly above age norm, whereas the risk group scored within the norm. In the at-risk group, training based on the BU principle had the strongest effects on phonological awareness and working memory scores, whereas training based on the TD principle had the strongest effects on verbal learning, letter knowledge, and literacy scores. It was concluded that appropriate, specific, data-based intervention starting in preschool can mitigate literacy impairment and that interventions should contain BU training for preliteracy skills and TD training for literacy training. 相似文献
20.
Fifteen Portuguese children with dyslexia, aged 9–11 years, were compared with reading and chronological age controls with
respect to five indicators related to the phonological deficit hypothesis: the effects of lexicality, regularity, and length,
implicit and explicit phonological awareness, and rapid naming. The comparison between groups indicates that Portuguese children
with dyslexia have a phonological impairment which is revealed by a developmental deficit in implicit phonological awareness
and irregular word reading (where younger reading level controls performed better than dyslexics) and by a developmental delay
in decoding ability and explicit phonological awareness (where dyslexics matched reading level controls). These results are
discussed in relation to the idea that European Portuguese is written in an orthography of intermediate depth. 相似文献