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1.
The question of which cognitive impairments are primarily associated with dyslexia has been a source of continuous debate. This study examined the cognitive profile of Hebrew-speaking compensated adult dyslexics and investigated whether their cognitive abilities accounted for a unique variance in their reading performance. Sixty-nine young adults with and without dyslexia were administered a battery of tests measuring their reading skills and a number of cognitive abilities. The dyslexics were found to exhibit a generally poor cognitive profile, including their attention, visual working memory, naming, visual perception and speed of processing abilities, with the exception of high executive functions skills. Furthermore, naming speed, visual working memory and attention were significantly associated with decoding and fluency measures and predicted group difference after controlling for phonological skills. The findings point to the contribution of cognitive factors to decoding rate and possibly to the ability of utilizing rapid orthographic processes, thus effecting dyslexics’ reading performance. 相似文献
2.
Nathlie A. Badian 《Annals of dyslexia》1994,44(1):1-25
Because of the research demonstrating the roles of phonological awareness, serial naming speed, and orthographic processing
in reading, a test of each of these skills was added to a preschool screening battery. The main aim of the study was to determine
whether these measures would contribute to the prediction of reading. The 118 subjects were first tested six months before
kindergarten entry and were followed up 19 and 24 months later. Each additional screening test made a significant, independent
contribution to the prediction of early first grade word reading/spelling, after the contributions of a parent rating of preschool
reading ability (PRA), verbal IQ, socio-economic status (SES), and chronological age were accounted for. With letter naming
and PRA, the additional tests were responsible for 62 percent of the variance. The orthographic test made the largest single
contribution (32%) to the variance in word reading/spelling.
Variables contributing significantly to the prediction of later first grade reading comprehension were (in order of proportion
of the variance accounted for) letter naming, sentence memory, object naming speed, the orthographic test, and SES. The revised
preschool screening battery correctly identified 91 percent of individual first grade good and poor readers. It was concluded
that preschool measures of phonological awareness, serial naming speed, and orthographic processing make a strong contribution
to prediction of first grade reading. 相似文献
3.
An increasing number of students with dyslexia register in higher education. As a consequence, information on their pattern of strengths and weaknesses is essential to construct adequate assessment and diagnostic protocols. In a sample of 100 first-year bachelor students with dyslexia and 100 control students, a large pool of cognitive skills were tested using a variety of tests. When we applied an exploratory factor analysis to scores, a model with ten factors fitted the data best. Effect sizes were used to express the processing costs of students with dyslexia. The factors related to reading, spelling, flashed orthography, phonology, naming, math, and reading fluency resulted in large effect sizes. A factor combining all measures for crystallized IQ had a medium effect size. The subtests for fluid intelligence were divided in two separate constructs. Relationships between all subtest scores are visualized and interpreted in a general theoretical and practical framework. 相似文献
4.
The present study was designed to examine the question of whether developmental dyslexia in 12-year-old students at the beginning
of secondary education in the Netherlands is confined to problems in the domain of reading and spelling or also is related
to difficulties in other areas. In particular, hypotheses derived from theories on phonological processing, rapid automatized
naming, working memory, and automatization of skills were tested. To overcome the definition and selection problems of many
previous studies, we included in our study all students in the first year of secondary special education in a Dutch school
district. Participants were classified as either dyslexic, garden-variety, or hyperlexic poor readers, according to the degree
of discrepancy between their word recognition and listening comprehension scores. In addition, groups of normal readers were
formed, matching the poor readers in either reading age or chronological age. A large test battery was administered to each
student, including phonological, naming, working memory, speed of processing, and motor tests. The findings indicate that
dyslexia is associated with deficits in (1) phonological recoding, word recognition (both in their native Dutch and in English
as a second language), and spelling skills; and (2) naming speed for letters and digits. Dyslexia was not associated with
deficits in other areas. The results suggest that developmental dyslexia, at the age of 12, might be (or might have become)
a difficulty rather isolated from deficiencies in other cognitive and motor skills. 相似文献
5.
This study explores the contribution of cognitive processes to comprehension skills in adults who suffered from childhood developmental dyslexia (CD). The performance of adults with CD (ages 17 to 23), chronological age-matched (CA) adults, and reading level-matched (RL) children was compared on measures of phonological processing, naming speed, working memory (WM), general knowledge, vocabulary, and comprehension. The results showed that adults with CD scored lower on measures of phonological processing, naming speed, WM, general knowledge, and vocabulary when compared to CA readers but were comparable to RL children on the majority of process measures. Phonological processing, naming speed, vocabulary, general knowledge, and listening comprehension contributed independent variance to reading comprehension accuracy, whereas WM, intelligence, phonological processing, and listening comprehension contributed independent variance to comprehension fluency. Adults with CD scored lower than CA adults and higher than RL children on measures of lexical processing, WM, and listening comprehension when word recognition and intelligence were partialed from the analysis. In summary, constraints in phonological processing and naming speed mediate only some of the influence of high-order processes on reading comprehension. Furthermore, adults with CD experience difficulties in WM, listening comprehension, and vocabulary independently of their word recognition problems and intellectual ability. 相似文献
6.
7.
Reading fluency beyond decoding is a limitation to many children with developmental reading disorders. In the interest of
remediating dysfluency, contributing factors need to be explored and understood in a developmental framework. The focus of
this study is orthographic processing in developmental dyslexia, and how it may contribute to reading fluency. We investigated
orthographic processing speed and accuracy by children identified with dyslexia that were enrolled in an intensive, fluency-based
intervention using a timed visual search task as a tool to measure orthographic recognition. Results indicate both age and
treatment effects, and delineate a link between rapid letter naming and efficient orthographic recognition. Orthographic efficiency
was related to reading speed for passages, but not spelling performance. The role of orthographic learning in reading fluency
and remediation is discussed. 相似文献
8.
Savage RS Frederickson N Goodwin R Patni U Smith N Tuersley L 《Journal of learning disabilities》2005,38(1):12-28
In this article, we explore the relationship between rapid automatized naming (RAN) and other cognitive processes among below-average, average, and above-average readers and spellers. Nonsense word reading, phonological awareness, RAN, automaticity of balance, speech perception, and verbal short-term and working memory were measured. Factor analysis revealed a 3-component structure. The first component included phonological processing tasks, RAN, and motor balance. The second component included verbal short-term and working memory tasks. Speech perception loaded strongly as a third component, associated negatively with RAN. The phonological processing tests correlated most strongly with reading ability and uniquely discriminated average from below- and above-average readers in terms of word reading, reading comprehension, and spelling. On word reading, comprehension, and spelling, RAN discriminated only the below-average group from the average performers. Verbal memory, as assessed by word list recall, additionally discriminated the below-average group from the average group on spelling performance. Motor balance and speech perception did not discriminate average from above- or below-average performers. In regression analyses, phonological processing measures predicted word reading and comprehension, and both phonological processing and RAN predicted spelling. 相似文献
9.
The role of speed of processing, rapid naming, and phonological awareness in reading achievement 总被引：5，自引：0，他引：5
Catts HW Gillispie M Leonard LB Kail RV Miller CA 《Journal of learning disabilities》2002,35(6):509-524
This study investigated the role of speed of processing, rapid naming, and phonological awareness in reading achievement. Measures of response time in motor, visual, lexical, grammatical, and phonological tasks were administered to 279 children in third grade. Measures of rapid object naming, phonological awareness, and reading achievement were given in second and fourth grades. Reading group comparisons indicated that poor readers were proportionally slower than good readers across response time measures and on the rapid object naming task. These results suggest that some poor readers have a general deficit in speed of processing and that their problems in rapid object naming are in part a reflection of this deficit. Hierarchical regression analyses further showed that when considered along with IQ and phonological awareness, speed of processing explained unique variance in reading achievement. This finding suggests that a speed of processing deficit may be an "extraphonological" factor in some reading disabilities. 相似文献
10.
Jurgen Tijms 《教育心理学》2011,31(7):873-896
The clinical effectiveness of a treatment for children with dyslexia was examined, as well as the moderating impact of plausible cognitive and socio-economic factors on treatment success. Results revealed that the treatment group accrued significant greater gains than the control group in reading and spelling skills. The treatment group obtained a level of reading accuracy and spelling that was comparable with the normative mean. Post-treatment levels of reading rate were comparable to the lower bound of the normal range. Treatment effectiveness was robust against individual differences, except for a moderating impact of phonological memory and rapid automatized naming. 相似文献
11.
First-grade students (N = 221) were individually tested on a battery of cognitive and achievement measures of verbal fluency, visual attention, phonological awareness, orthographic recognition, rapid automatized naming (RAN) of letters and objects, and reading. All tests were subjected to postacquisition scoring, and all RAN measures were segregated into measures of articulation time, pause time, and consistency of the pause time. Structural equation modeling demonstrated that word reading was directly and significantly predicted by RAN letter naming and general RAN cognitive processing time of objects. Moreover, RAN letter reading constructs were significantly and directly predicted by the latent variables of phonological awareness, orthographic recognition, and general RAN object articulation and cognitive processing times. RAN letter naming constructs were also significantly and indirectly predicted by visual attention. The reading model was found to be consistent with a total mediation of the relation of phonological awareness and reading through RAN letter naming and supported the validity of the RAN letter naming subtest as a basic letter reading test. These findings supported the double-deficit hypothesis for letter reading. We suggest that phonological memory is a basic factor underlying general RAN cognitive processing time of objects and domain-specific information associated with phonemes and their graphic representations. 相似文献
12.
Swanson HL 《Journal of learning disabilities》2012,45(1):17-30
This article reviews the results of a meta-analysis of the experimental published literature that compares the academic, cognitive, and behavioral performance of adults with reading disabilities (RD) with average achieving adult readers. The meta-analysis shows that deficits independent of the classification measures emerged for adults with RD on measures of vocabulary, math, spelling, and specific cognitive process related to naming speed, phonological processing, and verbal memory. The results also showed that adults with high verbal IQs (scores > 100) but low word recognition standard scores (< 90) yielded greater deficits related to their average reading counterparts when compared to studies that included adults with RD with verbal IQ and reading scores in the same low range. Implications of the findings related to assessment and intervention are discussed. 相似文献
13.
The present study sought to identify cognitive abilities that might distinguish Hong Kong Chinese adolescents with dyslexia and to assess how these abilities were associated with Chinese word reading, word dictation, and reading comprehension. The cognitive skills of interest were morphological awareness, visual-orthographic knowledge, rapid naming, and verbal working memory. A total of 90 junior secondary school students, 30 dyslexic, 30 chronological age controls, and 30 reading level controls was tested on a range of cognitive and literacy tasks. Dyslexic students were less competent than the control students in all cognitive and literacy measures. The regression analyses also showed that verbal working memory, rapid naming, morphological awareness, and visual-orthographic knowledge were significantly associated with literacy performance. Findings underscore the importance of these cognitive skills for Chinese literacy acquisition. Overall, this study highlights the persistent difficulties of Chinese dyslexic adolescents who seem to have multiple causes for reading and spelling difficulties. 相似文献
14.
In a large sample (N = 439) of literacy impaired and unimpaired elementary school children the predictions of the temporal processing theory of dyslexia were tested while controlling for (sub)clininal attentional deficits. Visual and Auditory Temporal Order Judgement were administered as well as three subtests of a standardized attention test. The correlation between visual and auditory TOJ was only moderate, challenging the assumption of a general, cross-modal temporal processing deficit. Regression analyses revealed attention as a significant predictor of children's TOJ performance. Once attentional differences were accounted for, temporal processing made a significant but small contribution (3% of variance explained) to reading (but not spelling), but also to arithmetic achievement, indicating that the prediction is not specific to literacy skills. Phonology and Rapid Automatized Naming explained considerable variance even when introduced after TOJ, contradicting the assumption that the verbal deficits in dyslexia result from temporal processing problems. Multiple case studies of 40 children with serious deficits in temporal processing revealed no consistent group pattern. Problems in temporal processing do not necessarily lead to literacy impairment but might be a marker of minor deviances in brain development. 相似文献
15.
Literacy components model for at‐risk young adults enrolled in career and technical education 
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下载免费PDF全文 Little is known about literacy skills of an important adult population: educationally and economically disadvantaged young adults. This exploratory study used principal components analysis of 33 measures of reading subskills, spelling, maths, memory and other cognitive processes among 335 at‐risk 16‐ to 24‐year‐olds enrolled in a career and technical education programme. The analysis yielded a five‐component model explaining 69% of the variance in the data. Most of this variance was attributed to two components: element and word skills (including spelling) and language comprehension (including vocabulary). Using these components, models predicting two performance criterion measures yielded different results. A model using all five components predicted 51% of functional reading measured by the Comprehensive Adult Student Assessment System. A three‐component model with element and word skills, language comprehension and processing speed predicted 55% of variance in reading comprehension measured by the Test of Adult Basic Education. Implications of these findings for further research are discussed. 相似文献
16.
The purpose of this study was to assess the contributions of specific components of verbal and nonverbal working memory and of phonological awareness to the prediction of reading achievement. One hundred and three children from grades 1, 2, and 3 were administered a measure of phonological awareness, four measures of working memory, four measures of academic achievement, and a measure of verbal intelligence. Separate multiple regression analyses controlling for the effects of age, sex and verbal intelligence showed that tests of verbal memory and of direct recall significantly predicted reading and spelling achievement whereas tests of backward recall significantly predicted only pseudoword identification. Phonological awareness was also found to relate significantly to reading and spelling achievement even when working memory was partialled out. Thus, phonological awareness and measures of working memory predicted specific and significant amounts of variance in reading and spelling achievement. Further, none of these measures were specifically related to arithmetic achievement. The specific roles of phonological awareness and working memory in reading development are examined in the discussion. 相似文献
17.
Persistence of phonological processing deficits in college students with dyslexia who have age-appropriate reading skills 总被引：7，自引：0，他引：7
This study investigated the phonological processing skills of university students with dyslexia. Fifty-nine students participated in this study: 28 with reading disabilities based on recent psychological assessments and a history of early and persistent reading problems; and 31 controls. The two groups did not differ on estimates of verbal and nonverbal abilities. The dyslexia group performed significantly less well on standardized measures of reading and spelling. However, the dyslexia group scores on these measures fell within the average range. The main dependent variables were subsumed under three areas of phonological processing: phonological awareness, phonological recoding in lexical access, and phonological recoding in working memory. The control group performed significantly better on all phonological processing measures, particularly those measures involving accuracy and response times. Despite age-appropriate performances on standardized reading and spelling measures, phonological processing deficits persisted in the dyslexia group. These findings support the causal role of phonological awareness in the acquisition of reading skills and indicate that differences in phonological processing skills are still evident in a sample of university students with dyslexia compared a group matched on age and education. 相似文献
18.
The development of reading skills may depend to a certain extent on the development of basic visual perception. The magnocellular
theory of developmental dyslexia assumes that deficits in the magnocellular pathway, indicated by less sensitivity in perceiving
dynamic sensory stimuli, are responsible for a proportion of reading difficulties experienced by dyslexics. Using a task that
measures coherent motion detection threshold, this study examined the relationship between dynamic visual perception and reading
development in Chinese children. Experiment 1 compared the performance of 27 dyslexics and their age- and IQ-matched controls in the coherent motion detection task and
in a static pattern perception task. Results showed that only in the former task did the dyslexics have a significantly higher
threshold than the controls, suggesting that Chinese dyslexics, like some of their Western counterparts, may have deficits
in magnocellular pathway. Experiment 2 examined whether dynamic visual processing affects specific cognitive processes in reading. One hundred fifth-grade children
were tested on visual perception and reading-related tasks. Regression analyses found that the motion detection threshold
accounted for 11% and 12%, respectively, variance in the speed of orthographic similarity judgment and in the accuracy of
picture naming after IQ and vocabulary size were controlled. The static pattern detection threshold could not account for
any variance. It is concluded that reading development in Chinese depends to a certain extent on the development of dynamic
visual perception and its underlying neural pathway and that the impact of visual development can be specifically related
to orthographic processing in reading Chinese. 相似文献
19.
The present study aimed to investigate the double-deficit hypothesis (DDH) in an orthography of intermediate depth. Eighty-five European Portuguese-speaking children with developmental dyslexia, aged 7 to 12, were tested on measures of phonological awareness (PA), naming speed (NS), reading, and spelling. The results indicated that PA and NS were not significantly correlated, and that NS predicts reading fluency (but not reading accuracy and spelling) beyond what is accounted for by PA. Although the majority of the children with developmental dyslexia have double deficit (62.4%), some children have a single phonological deficit (24.7%) or a single NS deficit (8.2%). Children with a double deficit were not more impaired in reading fluency, reading accuracy, and spelling than both single-deficit subtypes. In conclusion, the findings of the present study are partially consistent with the DDH and provide evidence for the multifactorial model of developmental dyslexia. Implications of the DDH for an orthography of intermediate depth are emphasized.
相似文献20.
Phonological awareness has been found to be strongly related to spelling. Findings on the relations between rapid‐naming and spelling are less consistent and have been suggested to be shared with speed of processing. This study set out to examine these relations in spelling and reading of Hebrew. Children attending the regular educational system were followed longitudinally (N = 70): phonological awareness, rapid‐naming and speed of processing were tested in kindergarten and in grade 1, and spelling and reading were tested in grade 2. Kindergarten and grade 1 rapid‐naming predicted spelling and word reading, and grade 1 phonological awareness predicted spelling, word reading and decoding. Speed of processing was an insignificant predictor. The findings extend the role of phonological awareness in spelling to an orthography with partial phonological representations and concurrently suggest weak relations. The results further suggest a link between rapid‐naming and orthographic knowledge, which may not be explained by shared variance with speed of processing. 相似文献