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1.
Reading,syntactic, and working memory skills of bilingual Portuguese-English Canadian children 总被引：1，自引：0，他引：1
The purpose of the study was to examine the nature of language, memory, and reading skills of bilingual students and to determine the relationship between reading problems in English and reading problems in Portuguese. The study assessed the reading, language, and memory skills of 37 bilingual Portuguese-Canadian children, aged 9–12 years. English was their main instructional language and Portuguese was the language spoken at home. All children attended a Heritage Language Program at school where they were taught to read and write Portuguese. The children were administered word and pseudoword reading, language, and working memory tasks in English and Portuguese. The majority of the children (67%) showed at least average proficiency in both languages. The children who had low reading scores in English also had significantly lower scores on the Portuguese tasks. There was a significant relationship between the acquisition of word and pseudoword reading, working memory, and syntactic awareness skills in the two languages. The Portuguese-Canadian children who were normally achieving readers did not differ from a comparison group of monolingual English speaking normally achieving readers except that the bilingual children had significantly lower scores on the English syntactic awareness task. The bilingual reading disabled children had similar scores to the monolingual reading disabled children on word reading and working memory but lower scores on the syntactic awareness task. However, the bilingual reading disabled children had significantlyhigher scores than the monolingual English speaking reading disabled children on the English pseudoword reading test and the English spelling task, perhaps reflecting a positive transfer from the more regular grapheme phoneme conversion rules of Portuguese. In this case, bilingualism does not appear to have negative consequences for the development of reading skills. In both English and Portuguese, reading difficulties appear to be strongly related to deficits in phonological processing. 相似文献
2.
The purpose of this study was to investigate the hypothesis that the manner in which a reading disability is defined will influence the conclusions that are made about the characteristics of the disability. To test this hypothesis, learning disabled and normally achieving children, aged 6 to 14, were administered tasks measuring grammatical, shortterm memory, phonological, reading, and visual-spatial skills. The poor readers were divided into groups of poor readers with
These children were compared with children who had normal reading scores. Children with deficits in phonics and/or word recognition scored significantly below normal on all the cognitive tests, except some of the visual-spatial tasks. Reading comprehension difficulties were characterized by average phonics, word recognition, and language skills but below average scores on some memory tasks. Slow readers had cognitive profiles similar to the normal children. The presence of a deficit in phonics and/or word recognition constituted the basis of the most serious impairment of language and memory functioning. Reading disabled children, defined in this manner, appear to be reasonably homogeneous in regard to the presence of language and memory problem. There does not appear to be evidence for a distinctive non-language impaired subtype within this type of reading disability. Children with low comprehension scores and/or slow readers did not have language problems. The definition of a reading disability appears to determine the subtypes and characteristics of reading disability that will emerge. 相似文献
| 1. | inadequate phonics skills, |
| 2. | inadequate word recognition skills, |
| 3. | adequate word recognition skills but low reading comprehension scores, and |
| 4. | adequate word recognition scores but a slow reading speed. |
3.
The purpose of the present study was to explore the relative roles of IQ and cognitive processes in reading performance. A sample of 443 Spanish children (264 male, 179 female) ranging in age from 7 to 13 years were classified into four groups according to IQ scores (<80, 80–90, 90–110, >110) and reading disabled (RD) and normally achieving readers (NR) were compared. The findings indicate that IQ scores were not related to the differences between children with RD and NR. We found that reading‐related cognitive deficits do differentiate between RD and NR children. Therefore, IQ scores do not make a significant contribution to our understanding of reading disability. 相似文献
4.
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
5.
Children classified as hyperlexic learn to readwords spontaneously before age five, areimpaired in both reading and listeningcomprehension, and exhibit word recognitionskills above their linguistic and cognitiveabilities. Despite their strong wordrecognition skills, previous studies have shownthat the phonemic awareness skills ofhyperlexic children are low and notcommensurate with their word reading skill, inpart because of their limited comprehension of phonemic awareness tasks. Heretofore, a verylimited number of studies have investigateddirectly the orthographic processing, syntacticprocessing, and working memory skills ofchildren with hyperlexia. In the presentstudy, measures of orthographic processing,syntactic processing, and working memory skillwere administered to three hyperlexic childrenand three normally achieving readers; inaddition, measures of phonemic awareness,academic achievement, and cognitive abilitywere also administered. Results showed thatthe hyperlexic children performed aboveexpectations on the orthographic processingmeasures based on their cognitive andlinguistic abilities. The children withhyperlexia did not exhibit orthographic skillsthat were superior to the normally achievingreaders, although ceiling effects on theorthographic tasks may not have allowed them todemonstrate this skill. The three children withhyperlexia achieved lower scores than thenormally achieving readers on the syntacticprocessing measures and had great difficulty onthe phonemic awareness measures. Only one ofthe three hyperlexic children performed at alevel consistent with that of normallyachieving readers on the working memorymeasures. Findings suggest the hyperlexicchildren had levels of orthographic processingsimilar to that of normally achieving readers,read words using strategies similar to those ofnormal readers, and had phonemic awarenessskill that appears to be adequate for wordanalysis but could not be demonstrated ontraditional phonemic awareness measures. 相似文献
6.
This study examined the effects of extra time on the reading comprehension performance of a heterogeneous group of adults
with reading disabilities. Sixty-four adults participated. A clinic that assesses learning disabilities identified 22 as reading
disabled, and 42 as normal readers. The 64 adults took a reading comprehension test under both timed and untimed conditions.
Other skills measured included vocabulary, word reading, non-word reading, spelling, arithmetic, and short-term memory. Under
timed conditions, there were significant differences between the participants with reading disabilities and the normally achieving
participants. All of the reading disabled participants in the present study benefited from extra time, but the normally achieving
readers performed similarly under the timed and untimed conditions. Further, in the untimed condition, the performance of
the individuals with a less severe reading disability was not significantly different that of the Average readers. The study
suggests that extra time during testing is an appropriate accommodation to help individuals begin to compensate for reading
disabilities. 相似文献
7.
Fact retrieval deficits in low achieving children and children with mathematical learning disability
Using 4 years of mathematics achievement scores, groups of typically achieving children (n = 101) and low achieving children with mild (LA-mild fact retrieval; n = 97) and severe (LA-severe fact retrieval; n = 18) fact retrieval deficits and mathematically learning disabled children (MLD; n = 15) were identified. Multilevel models contrasted developing retrieval competence from second to fourth grade with developing competence in executing arithmetic procedures, in fluency of processing quantities represented by Arabic numerals and sets of objects, and in representing quantity on a number line. The retrieval deficits of LA-severe fact retrieval children were at least as debilitating as those of the children with MLD and showed less across-grade improvement. The deficits were characterized by the retrieval of counting string associates while attempting to remember addition facts, suggesting poor inhibition of irrelevant information during the retrieval process. This suggests a very specific form of working memory deficit, one that is not captured by many typically used working memory tasks. Moreover, these deficits were not related to procedural competence or performance on the other mathematical tasks, nor were they related to verbal or nonverbal intelligence, reading ability, or speed of processing, nor would they be identifiable with standard untimed mathematics achievement tests. 相似文献
8.
The present study investigates the performance of persons with reading disabilities (PRD) on a variety of sequential visual-comparison tasks that have different working-memory requirements. In addition, mediating relationships between the sequential comparison process and attention and memory skills were looked for. Our findings suggest that PRD perform worse than normally achieving readers (NAR) when the task requires more than a minimal amount of working memory, unrelated to presentation rate. We also demonstrate high correlations between performance on the task with the most working-memory demands and reading-related skills, suggesting that poor working-memory abilities may be one of the underlying mechanisms of dyslexia. The mediating model analysis indicates that order judgment tasks are mediating to verbal working memory, suggesting that visual sequence memory precedes auditory sequence memory. We further suggest that visual tasks involving sequential comparisons could probe for poor working memory in PRD. 相似文献
9.
Attention deficit disorder and specific reading disability: separate but often overlapping disorders 总被引：3，自引：0，他引：3
Within a large (N = 182) heterogeneous sample of clinic-referred children with DSM-III-diagnosed attention deficit disorder (ADD), three behavioral subgroups were identified via cluster analysis of teacher ratings: 40% of the children had ADD with hyperactivity (ADDH), 30% had ADD with hyperactivity and aggressivity (ADDHA), and 31% had ADD without hyperactivity or aggressivity. Proportionally more girls were in the ADD-only subgroup. Over half the sample (n = 94) were poor readers, with 82 meeting discrepancy criteria for specific reading disability (RD). Proportionately more boys than girls met the RD criteria (9.2:1.0), whereas the sex ratio of males to females for the whole sample was 5.1 to 1.0. Focusing just on white males, the three behavioral subgroups were significantly different on convergent validity measures, such as other teacher ratings, parent ratings, and interview-elicited ratings of externalizing behavior, but were not different on such divergent validity measures as IQ and achievement scores, self-ratings, and laboratory performance tasks. Boys in the ADD sample who did not meet criteria for RD had significantly higher IQs than those who did, but subgroups with and without RD still differed significantly on WRAT-R reading and spelling scores with IQ covaried out. Both groups with and without RD could be differentiated from a control group on laboratory measures of sustained attention and impulse control. Methylphenidate benefited all subgroups equally, whether RD or not, and whether given a low (0.3 mg/kg) or high (0.6 mg/kg) dose. 相似文献
10.
Conventional methods of differentiating reading disability (RD) caused by deficits in decoding skills or comprehension from poor reading performance caused by inconsistent attention associated with attention-deficit/hyperactivity disorder (ADHD) have produced equivocal results. This study presents a model of differential diagnosis of attentional problems and RD that differs from these conventional approaches. The new diagnostic procedure uses intraindividual differences seen in the performance of at-risk learners on tasks related to reading that vary in their sensitivity to the sustained attention required for successful performance. The hypothesis is that children with inconsistent attention would perform more poorly on tests that require sustained attention, such as listening comprehension, than on tests that are more tolerant of inattention, such as reading comprehension. Such differences would not be seen in the test scores of children who have only RD, because their performance is determined more by the difficulty level of the reading tests than by the degree of sensitivity of the task to attention. The validity of this new model was evaluated by determining the capability of the differences seen in the scores of tests that differ in their sensitivity to sustained attention to predict the degree of inconsistency in sustained attention as measured by a continuous performance test. The data obtained from 39 children who are at risk for RD suggest that this is a viable model. 相似文献
11.
The present study was designed to assess the development of the understanding of certain aspects of grapheme-phoneme correspondences in normally achieving and disabled readers. The correspondences rules were studied using both English words and pseudowords, the latter designed to contain the same features as the real words. The subjects were 76 normally achieving and 32 reading disabled children aged 6 to 14 years. The stimuli included words and pseudowords that tested the following: consonant blends, final e, r-influenced vowels, regular and irregular words, function words, and consistent and inconsistent vowels. When matched for chronological age, the reading disabled children performed significantly more poorly than normally achieving children on all of the tasks involving pseudowords. A similar pattern was found for the words with the exception of the highest frequency words (cvc, final e, consonant blends) at the oldest age level, 11–14 years. In this case, the performance of the oldest reading disabled children was similar to that of the normals on the words, but was still significantly poorer when the stimuli were pseudowords. Complexity and irregularity were significant determinants of difficulty. Comparisons were also made for groups of children matched on reading grade level. Even when the reading disabled and normally achieving children were matched on reading grade, the reading disabled children had significantly more difficulty, particularly with pseudowords. Reading disabled children had significant difficulty in abstracting the basic rules for grapheme-phoneme correspondences in English, and even when they have mastered these rules in connection with real words, they still had difficulty applying these rules to pseudowords. In normal development, the learning of these correspondences appears to be consolidated by approximately 9 years of age. However, reading disabled children appear to have a significant and persistent problem with the learning of basic grapheme-phoneme correspondence rules. 相似文献
12.
Three groups of children with dyslexia, with mean age 8, 13 and 17 years, together with three groups of normally achieving children matched for age and IQ with the dyslexic groups, undertook tests of sound categorization and phoneme deletion. The design allowed comparison not only across chronological age but also across reading age. The children with dyslexia performed significantly worse even than their reading age controls on both tasks. Indeed, overall performance of the 17 year old children with dyslexia was closest, but inferior, to that of the 8 year old controls. Since the sound categorization task was designed to minimize working memory load, the results extend previous findings on the phonological awareness deficits in dyslexia by dissociating the deficit from memory load and by showing that it persists at least into late adolescence. 相似文献
13.
Peggy T. Ackerman Carol A. Holloway Patricia L. Youngdahl Roscoe A. Dykman 《Learning disabilities research & practice》2001,16(3):152-160
The double-deficit theory of reading disability (Wolf & Bowers, 1999) was examined in a sample of 56 reading-disabled and 45 normal-reading elementary school children (aged 8 to 11). As hypothesized, the two groups differed markedly on all phonological analysis tasks and on rapid continuous naming of digits and letters (the double deficits), but they differed as well on orthographic tasks, attention ratings, arithmetic achievement, and all WISC-III factors except perceptual organization. Within the reading-disabled (RD) sample, children in the double-deficit subgroup were no more impaired in reading and spelling than those with a single deficit in phonological analysis, and those with a single deficit in rapid naming were no more impaired than those with neither deficit. Multiple regression analyses suggest that a multiple causality theory of RD is more plausible than a double-deficit theory. 相似文献
14.
Penny Chiappe Ron Stringer Linda S. Siegel Keith E. Stanovich 《Reading and writing》2002,15(1-2):73-107
It has been proposed that the phonological coredeficit that is linked to reading failure hasas its underlying cause a deficit in temporalprocessing. In a multivariate investigationdesigned to examine the temporal processingdeficit hypothesis, thirty reading-disabled(RD) adults, thirty-two normally achievingadults and thirty-one normally achievingchildren (reading-level controls) wereadministered a comprehensive battery thatincluded a wide range of timing tasks, inaddition to reading and phonological measures. Although adults with RD displayed overallperformance that was below that of normallyachieving adults on most of the timing tasks,their performance was not differentiallyinfluenced by rate of stimulus presentation. Although the RD adults displayed the typicalpattern of impaired phonological awareness andpseudoword reading relative to reading-levelmatched children, the reading-disabled adultsoutperformed the children on the timing tasks. Finally, with the exception of continuousnaming, the timing tasks shared little variancewith phonological sensitivity and contributedlittle unique variance to word reading. Although these findings undermine the timingdeficit hypothesis, they do provide evidencefor the involvement of naming deficits inreading disability. 相似文献
15.
This study examines visual and spatial working memory skills in 35 third to fifth graders with both mathematics learning disabilities (MLD) and poor problem-solving skills and 35 of their peers with typical development (TD) on tasks involving both low and high attentional control. Results revealed that children with MLD, relative to TD children, failed spatial working memory tasks that had either low or high attentional demands but did not fail the visual tasks. In addition, children with MLD made more intrusion errors in the spatial working memory tasks requiring high attentional control than did their TD peers. Finally, as a post hoc analysis the sample of MLD was divided in two: children with severe MLD and children with low mathematical achievement. Results showed that only children with severe MLD failed in spatial working memory (WM) tasks if compared with children with low mathematical achievement and TD. The findings are discussed on the basis of their theoretical and clinical implications, in particular considering that children with MLD can benefit from spatial WM processes to solve arithmetic word problems, which involves the ability to both maintain and manipulate relevant information. 相似文献
16.
We studied the connection of IQ, reading disability (RD) and their interaction with reading, spelling and other cognitive skills in adolescents with average IQ and RD (n = 22), average IQ, non-RD (n = 71), below average IQ and RD (n = 29), and below average IQ non-RD (n = 33). IQ was not connected to reading and spelling in subjects without RD, but a connection to non-word spelling in subjects with RD existed. IQ and RD showed a connection to other cognitive skills (IQ to working memory, verbal memory and syntactic skills, RD to poor performance in text reading and rapid naming and both of them to reading comprehension, phonological and arithmetic skills), but no interaction existed. Our results are consistent with those of earlier studies showing that IQ does not play a significant role in the presentation of RD. However, adolescents with below average IQ and RD seemed to have much broader deficits in academically important skills such as arithmetic and reading comprehension than the other groups. 相似文献
17.
The current meta-analysis synthesized findings from profiling research on Chinese children with reading difficulties (RD). We reviewed a total of 81 studies published between 1964 and May 2015, representing a total of 9735 Chinese children. There are 982 effect sizes for the comparison between children with RD and age-matched typically developing (A-TD) children and 152 effect sizes for the comparison between children with RD and reading-level-matched typically developing (R-TD) children on multiple linguistic and cognitive skills. Results showed that compared to A-TD children, children with RD have severe deficits in morphological awareness, orthographic knowledge, phonological awareness, rapid naming, working memory, and visual skills and moderate deficits in short-term memory and motor skills. Compared to R-TD children, children with RD only have moderate deficits in rapid naming and mild deficits in orthographic knowledge. Moderation analyses for the comparison between RD and A-TD children revealed that children with more severe RD show more severe deficits in morphological awareness, phonological awareness, rapid naming, and visual skills. However, neither location (Mainland vs. Hong Kong) nor type of reading screening (character recognition vs. character recognition combined with reading comprehension) emerged as a moderator of the deficit profiles. These findings indicate that Chinese children with RD have deficits on a wide range of cognitive and linguistic skills. Deficits in rapid naming and orthographic knowledge may be potential causal factors for RD in Chinese based on existing evidence. Implications for the diagnosis and instructions of Chinese children with RD were discussed. 相似文献
18.
Cognitive mechanisms underlying achievement deficits in children with mathematical learning disability 总被引：4，自引：0，他引：4
Using strict and lenient mathematics achievement cutoff scores to define a learning disability, respective groups of children who are math disabled (MLD, n=15) and low achieving (LA, n=44) were identified. These groups and a group of typically achieving (TA, n=46) children were administered a battery of mathematical cognition, working memory, and speed of processing measures (M=6 years). The children with MLD showed deficits across all math cognition tasks, many of which were partially or fully mediated by working memory or speed of processing. Compared with the TA group, the LA children were less fluent in processing numerical information and knew fewer addition facts. Implications for defining MLD and identifying underlying cognitive deficits are discussed. 相似文献
19.
The Relations Between Children’s Reading Comprehension, Working Memory, Language Skills and Components of Reading Decoding in a Normal Sample 总被引：1，自引：0，他引：1
The primary aim of the current study was to identify the strongest independent predictors of reading comprehension using word
reading, language and memory variables in a normal sample of 180 children in grades 3–5, with a range of word reading skills.
It was hypothesized that orthographic processing, receptive vocabulary and verbal working memory would all make independent
contributions to reading comprehension. The contributions of reading speed, receptive grammatical skills, exposure to print,
visuospatial working memory and verbal learning and retrieval (a measure of longer-term retention) were also investigated.
Working memory tasks that required the processing and storage of numerical and spatial material were used. One of the numerical
working memory tasks was based on the number span task developed by Yuill, Oakhill, and Parkin British Journal of Psychology, 1989, 80, 351–361. A visuospatial equivalent of that task was developed from the forward Corsi block task [Corsi, Abstracts International, 1973, 34, 891]. The results revealed that, after controlling for age and general intellectual ability, the word reading and the language
variables had a much stronger relation with reading comprehension than the memory variables. The strongest independent predictor
of reading comprehension was orthographic processing since it captured variance in both word reading, language skills and
verbal working memory. The forward Corsi task and performance on a measure of verbal learning and retrieval each made small
independent contributions to reading comprehension but the contribution of verbal working memory was not significant. It was
concluded that tasks measuring the interplay between short-term and long-term memory, in which new information is combined
with information already stored in long-term memory, may better predict reading comprehension measured with the text available
than working memory tasks which only have a short-term memory component. 相似文献
20.
Visuospatial working memory in adolescents with poor performance in mathematics: variation depending on reading skills 总被引：2，自引：1，他引：1
Minna Kyttälä 《教育心理学》2008,28(3):273-289
The first purpose of this study was to investigate whether the visuospatial working memory (VSWM) skills of 15–16‐year‐old pupils with difficulties in mathematics differ from those of their normally achieving peers. The goal was to broaden the view of the complex system of VSWM. A set of passive and active VSWM tasks was used. The study’s second purpose was to investigate whether pupils with mathematical difficulties differed in their VSWM skills based on whether they had signs of reading deficits or not. Results indicate that the pupils with poor performance in maths showed poorer performance on certain VSWM tasks. The group with deficits only in maths had less capacity for storing passive visual simultaneous information, while the group with difficulties both in maths and reading had deficits in both storing (passive visual and visuospatial information) and processing, and had less ability to control irrelevant visuospatial information compared to their peers of the same age. The results indicate a general VSWM deficit in pupils with both mathematics and reading problems and a specific VSWM deficit in pupils with only mathematics problems. 相似文献