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1.
Linda Larsen Saskia Kohnen Genevieve McArthur Lyndsey Nickels 《Reading and writing》2018,31(4):991-1015
The aim of this study was to understand the relationship between children’s knowledge of letter-sound rules (“grapheme-phoneme knowledge”) and their ability to identify separate graphemes (e.g., SH, OI) that comprise words (“grapheme parsing”). We used a single-case study approach with children with phonological dyslexia who were able to read words accurately via whole-word processes (“lexical reading”), but were not able to read using grapheme-phoneme knowledge (“non-lexical reading”). These children were able to correctly parse some graphemes without grapheme-phoneme knowledge for these graphemes. However, they were unable to correctly parse some graphemes for which they had grapheme-phoneme knowledge. This dissociation suggests that children may acquire grapheme-phoneme knowledge and phoneme parsing independently. We discuss the implications of these findings for cognitive models of word reading. 相似文献
2.
Family risk of dyslexia is continuous: individual differences in the precursors of reading skill 总被引：12，自引：0，他引：12
The development of 56 children at family risk of dyslexia was followed from the age of 3 years, 9 months to 8 years. In the high-risk group, 66% had reading disabilities at age 8 years compared with 13% in a control group from similar, middle-class backgrounds. However, the family risk of dyslexia was continuous, and high-risk children who did not fulfil criteria for reading impairment at 8 years performed as poorly at age 6 as did high-risk impaired children on tests of grapheme-phoneme knowledge. The findings are interpreted within an interactive model of reading development in which problems in establishing a phonological pathway in dyslexic families may be compensated early by children who have strong language skills. 相似文献
3.
Margherita Orsolini Rachele Fanari Sara Cerracchio Luisa Famiglietti 《Reading and writing》2009,22(8):933-954
In this study we explore the development of phonological and lexical reading in dyslexic children. We tested a group of 14
Italian children who have been diagnosed with dyslexia and whose reading age is end of grade 1. We compared this group with
a group of 70 typically developing children who have been tested for reading at the end of grade 1. For each dyslexic child
we also selected a participant who was attending the same grade, was close in age, and showed typical reading development
when tested with a narrative passage reading task (Cornoldi, Colpo, & Gruppo MT, 1981) for correctness and reading speed. Children in this group are “same grade controls.” We used a reading task consisting of
40 three syllables words. A qualitative and quantitative method of coding children’s naming allowed us to distinguish several
components of their reading performance: the grapheme and word recognition, the size of orthographic units involved in the
aloud orthography–phonology conversion, the reading process used to recognize words. The comparison of the dyslexic group
with the reading age and the same grade control groups reveals different trends of delayed reading processes. Considering
dyslexic children’s chronological age, lexical reading is greatly delayed. Considering dyslexic children’s reading age, the
type of reading process that is more deeply delayed is phonological reading. The rate of fragmented phonological reading (i.e.,
a type of syllabized phonological reading) is much higher in dyslexic children compared to the reading age group, suggesting
that some factors undermine the possibility of internalizing the orthography–phonology conversion and the blending processes. 相似文献
4.
Leong CK 《Journal of learning disabilities》1999,32(3):224-238
A target group of college students with learning/reading disabilities was compared with reading-level (RA) and chronological-age (CA) contrast groups on several phonological and morphological computerized information-processing tasks. Results confirm the importance of accurate and rapid processing of simple lexical items to the automatic level. The target students were less accurate and took longer reaction time, as compared with their CA controls, though not with the RA contrast group, in deciding if pseudohomophonics sounded like real words and if pairs of words with different rime conditions rhymed. The target students showed both quantitative and qualitative differences in processing morphological words and morphographic letter strings, in contrast to some earlier findings. The integration of phonological and morphological knowledge is emphasized in working with adult college students with learning/reading disabilities. 相似文献
5.
Heinz Wimmer 《Reading and writing》1996,8(2):171-188
The present study retrospectively examined early difficulties with phonological coding and phonemic segmentation of German children who after four years in school were diagnosed as dyslexic. German, in comparison to English, exhibits rather simple and straight-forward grapheme-phoneme correspondences, and the initial teaching approach was phonics oriented. Despite these favorable circumstances for the acquisition of phonological coding, the majority of the later dyslexic children had particular difficulties with the accurate reading of nonwords and of unfamiliar words after about seven months of reading instruction. However, there were enormous differences between the dyslexic children. Two of them were completely unable to blend phonemes into pronunciations, another seven were slow and error prone decoders, and three children had slow and laborious pronunciation assembly as the core problem. The majority of the later dyslexic children also exhibited phonemic segmentation deficits as tested with a nonword spelling task and a phoneme reversal task. In correspondence with findings from older German dyslexic children, the early difficulties with accurate phonological coding and phonemic segmentation were no longer found at the end of grade four. Children then suffered from very slow reading and poor spelling. In general, the difficulties of German dyslexic children emphasize the phonological impairment account of dyslexia. More specifically, these findings suggest that the assembly of letter sounds into pronunciations is particularly affected in the early phase of learning to read a consistent orthography. 相似文献
6.
Chiara Valeria Marinelli Paola Angelelli Alessandra Notarnicola Claudio Luzzatti 《Reading and writing》2009,22(3):333-351
The study uses an orthographic judgment task to evaluate the efficiency of the lexical reading route in Italian dyslexic children.
It has been suggested that Italian dyslexic children rely prevalently on the sub-word-level routine for reading. However,
it is not easy to test the lexical reading route in Italian directly because of the lack of critical items (irregular words),
so visual lexical decision tasks and the comprehension/detection of pseudo-homophones are often used. While the former may
also be solved on the basis of visual familiarity or phonological re-codification, the latter also involves conceptual and
syntactic skills. Eleven dyslexic children participated in the study, performing an orthographic judgment task on stimuli
with two phonologically plausible spellings, of which only one was orthographically correct. Their performance was compared
with those of 11 proficient readers. The dyslexic children showed selective impairment in detecting phonologically plausible
errors, but their performance was normal when required to judge errors inserted in words with regular orthography, i.e., devoid
of orthographic ambiguity, and for which a sub-word-level reading procedure is sufficient to guarantee a good performance.
Overall, data are coherent with a diagnosis of surface dyslexia, with most children showing defective orthographic lexical
processing.
相似文献
| Paola AngelelliEmail: |
7.
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
8.
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
9.
Robert Davies Javier Rodríguez-Ferreiro Paz Suárez Fernando Cuetos 《Reading and writing》2013,26(5):721-738
In an opaque orthography like English, phonological coding errors are a prominent feature of dyslexia. In a transparent orthography like Spanish, reading difficulties are characterized by slower reading speed rather than reduced accuracy. In previous research, the reading speed deficit was revealed by asking children to read lists of words. However, speed in list reading sums the time required to prepare an utterance, reaction time (RT), with the time required to say it, response duration (RD). Thus, the dyslexic speed deficit in transparent orthographies could be driven by slow RTs, by slow RDs, or both. The distinction is especially important if developmental readers rely on phonological coding to achieve lexical access because the whole word would have to be encoded before it could be identified. However, while the factors that affect reading RT have been extensively investigated, no attention has been paid to RD. We studied the performance of typically developing and dyslexic Spanish children in an oral reading task. We analysed the impact of word frequency and length on reading accuracy, RT, and RD. We found that accuracy, RT, and RD were affected by word frequency and length for both control and dyslexic readers. We also observed interactions between effects of reader group—dyslexic, typically developing (TD) younger or TD older readers—and effects of lexicality, frequency, and word length. Our results show that children are capable of reading aloud using lexical and sub-lexical coding processes in a transparent orthography. 相似文献
10.
Cross-linguistic studies suggest that the orthographic system determines the reading performance of dyslexic children. In opaque orthographies, the fundamental feature of developmental dyslexia is difficulty in reading accuracy, whereas slower reading speed is more common in transparent orthographies. The aim of the current study was to examine the extent to which different variables of words affect reaction times and articulation times in developmental dyslexics. A group of 19 developmental dyslexics of different ages and an age-matched group of 19 children without reading disabilities completed a word naming task. The children were asked to read 100 nouns that differed in length, frequency, age of acquisition, imageability, and orthographic neighborhood. The stimuli were presented on a laptop computer, and the responses were recorded using DMDX software. We conducted analyses of mixed-effects models to determine which variables influenced reading times in dyslexic children. We found that word naming skills in dyslexic children are affected predominantly by length, while in non-dyslexics children the principal variable is the age of acquisition, a lexical variable. These findings suggest that Spanish-speaking developmental dyslexics use a sublexical procedure for reading words, which is reflected in slower speed when reading long words. In contrast, normal children use a lexical strategy, which is frequently observed in readers of opaque languages. 相似文献
11.
Paz Suárez-Coalla Nerea Villanueva Soledad González-Pumariega María González-Nosti 《Infancia y Aprendizaje》2016,39(2):275-311
In addition to reading difficulties, a significant proportion of developmental dyslexics have spelling problems, which persist into adulthood. Studies carried out in languages with opaque orthographies have found that dyslexics frequently make phonological substitutions when spelling and have difficulties in developing orthographic representations of irregular words. Those errors seem to derive from an excessive use of phonological codes when writing. Minimal research in Spanish (relatively transparent orthography) about the relationship between dyslexia and spelling difficulties has been carried out to date. In this study, 19 Spanish-speaking developmental dyslexics (from 7 to 11 years old) and 28 controls (from 6 to 11 years old, distributed in two groups, one matched for age and the other for reading level with the dyslexics) performed a dictation task of 80 stimuli with different levels of orthographic consistency, in order to discover the codes they use in the writing process. Results showed that Spanish children with dyslexia made significantly more spelling errors, especially among the ruled and irregular words. These findings are consistent with the idea that these children have difficulties in developing orthographic representations and use phonological codes more frequently than non-dyslexics, resulting in phonologically plausible errors when writing irregular words. These results have important implications for the treatment of spelling difficulties in children with dyslexia, highlighting the need to focus on the correct acquisition of grapheme-phoneme conversion rules as well as the development of appropriate orthographic representations. 相似文献
12.
13.
In addition to an intrinsic difficulty in reading and spelling, one of the defining characteristics of dyslexia is an enduring and pervasive difficulty in phonological coding, such that dyslexic readers find it particularly challenging to process and manipulate the constituent sounds of a language. Coexistent with this finding is the evidence that some dyslexic readers also demonstrate subtle sensory coding problems in the visual and auditory domains. Few theories have been proposed to unite these different findings within a coherent model of reading. Here the evidence for visual, auditory and phonological coding problems in dyslexia is briefly reviewed, and a hypothesis is proposed for how adequate early sensory coding may be intrinsic to phonological awareness and subsequent reading ability. In this hypothesis, a cortical network is assumed that incorporates the visual, auditory and phonological skills of reading. The visual sub‐component of the network is mediated by the dorsal visual pathway, which is responsible for the accurate spatial encoding of letters, words and text. The auditory component of the network in pre‐readers is intrinsic to the development of phonological sensitivity, and then grapheme‐phoneme assimilation as reading skills develop. In this hypothesis, some of the symptoms of dyslexia may result from subtle problems in the encoding of both visual and auditory information and their role in maintaining the synchronicity of the reading network. 相似文献
14.
Jurgen Tijms 《Journal of Research in Reading》2004,27(3):300-310
This study examines whether two frequently reported causes of dyslexia, phonological processing problems and verbal memory impairments, represent a double‐deficit or whether they are two expressions of the same deficit. Two‐hundred‐and‐sixty‐seven Dutch children aged 10–14 with dyslexia completed a list‐learning task and several phonological tasks, together with a number of reading and spelling tests. The results indicate that phonological deficits and verbal memory impairments in dyslexia stem from the same root, which seemingly reflects an inaccurate encoding of the phonological characteristics of verbal information. This phonological encoding deficit is a negative predictor for both the reading and spelling skills of dyslexic children. 相似文献
15.
Phonological processing skills and deficits in adult dyslexics 总被引：13，自引：0，他引：13
This article presents 4 experiments aimed at defining the primary underlying phonological processing deficit(s) in adult dyslexia. 5 phonological processes, all involving spoken language, were studied: phoneme perception, phoneme awareness, lexical retrieval of phonology, articulatory speed, and phonetic coding in verbal short-term memory. 2 differently ascertained adult dyslexic groups, familial dyslexics (n = 15) and clinic dyslexics (n = 15), were the subjects in each experiment. These dyslexic groups were chosen because deficits that persist until adulthood and that are found in differently ascertained dyslexic groups are more likely to be primary. Each dyslexic group was compared to 2 control groups, chronological age (CA) controls who were similar in age and sex, and younger reading age (RA) controls who were similar in reading age and sex. The main finding was a clear deficit in phoneme awareness in both dyslexic groups, with each dyslexic group performing significantly worse than both CA and RA controls. Moreover, performance on the 2 phoneme awareness tasks together uniquely accounted for substantial variance in nonword reading. The clinic but not the familial dyslexics appeared to have an additional deficit in verbal short-term memory. No clear deficits were found in either dyslexic group in phoneme perception, lexical retrieval, or articulatory speed. 相似文献
16.
This is an individual case study combined with subject sampling which compared the reading performance of good and poor Brazilian 4th grade children with Scottish children of equivalent reading competence and age range. A measure of efficient performance -- low error rates and fast vocal reaction-times for correct responses to words (of varying familiarity, regularity and length) and non-words (of varying length) -- was obtained and used as a basis for the identification of inefficiencies among the subjects whose results were outside the main range. Competent reading in Brazilian Portuguese and Scottish showed similarities in regard to time processing and error rates for the reading of words and non-words and mainly differed in terms of the generality of the regularity effect and of the rate of letter processing of words and for non-words. In what concerns impaired reading, in both nationalities there were examples of pure phonological dyslexia and of impairments affecting both lexical and non-lexical processes with a bias to the phonological pattern. In contrast to the Scottish sample, no cases of predominant morphemic dyslexia nor ambiguous cases were found among the Brazilians. 相似文献
17.
The major findings of several research projects that investigated dyslexic college students are summarized in this paper.
Consistent findings of these investigations led to the following conclusions. 1) Developmental dyslexia is a syndrome made
up of the following four symptoms: slow rate of reading, error-prone oral reading, poor written spelling, and grammatically
incorrect writing; 2) all these symptoms could be traced to a poor mastery of the grapheme-phoneme relational rules; 3) developmental
dyslexia can be found in subjects who appear to have adequate oral language skills; 4) ex-dyslexics who appear to be “poor
spellers but good readers” have subtle reading deficits; and 5) the 20 dyslexic subjects investigated appear to constitute
a homogeneous group which raises questions regarding dyslexia subtypes. 相似文献
18.
Franklin R. Manis Mark S. Seidenberg Lynne Stallings Marc Joanisse Caroline Bailey Laurie Freedman Suzanne Curtin Patricia Keating 《Annals of dyslexia》1999,49(1):105-134
There is a consensus that dyslexia is on a continuum with normal reading skill and that dyslexics fall at the low end of the
normal range in phonological skills. However, there is still substantial variability in phonological skill among dyslexic
children. Recent studies have focused on the high end of the continuum of phonological skills in dyslexics, identifying a
“surface” dyslexic, or “delayed” profile in which phonological skills are not out of line with other aspects of word recognition.
The present study extended this work to a longitudinal context, and explored differences among subgroups of dyslexics on a
battery of component reading skills. Third grade dyslexics (n=72) were classified into two subgroups, phonological dyslexics and delayed dyslexics, based on comparisons to younger normal
readers at the same reading level (RL group). The children were tested at two points (in third and fourth grade). The results
revealed that the classification of dyslexics produced reliable, stable, and valid groups. About 82 percent of the children
remained in the same subgroup category when retested a year later. Phonological dyslexics were lower in phoneme awareness
and expressive language. Delayed dyslexics tended to be slower at processing printed letters and words but not at rapid automatic
naming of letters, and relied more heavily on phonological recoding in reading for meaning than did phonological dyslexics.
A subset of the delayed dyslexics with the traditional “surface dyslexic” pattern (relatively high pseudoword and low exception
word reading) was also identified. The surface subgroup resembled the RL group on most measures and was not very stable over
one year. The results are discussed in light of current models of dyslexia and recent subgrouping schemes, including the Double-Deficit
Hypothesis. 相似文献
19.
Two groups of adolescents with a childhood history of language impairment were compared with a group of developmentally dyslexic
young people of the same age and nonverbal ability. The study also included two comparison groups of typically developing
children, one of the same age as those in the clinical groups, and a younger comparison group of similar reading level to
the dyslexic students. Tests of spoken and written language skills revealed that the adolescents with dyslexia were indistinguishable
from those with resolved language impairments on spoken language tasks, and both groups performed at age-expected levels.
However, both dyslexic readers and those with resolved specific language impairments showed deficits in phonological awareness.
On written language tasks, a different pattern of performance was apparent. In reading and spelling, adolescents with dyslexia
performed only as well as those with persistent oral language impairments and younger controls. However, their reading comprehension
was better. The theoretical and educational implications of these findings are discussed. 相似文献
20.
It is often discussed whether dyslexics show a deviant pattern of reading and spelling development when compared to typically developing students, or whether they follow the same pattern as other students, only at markedly slower rate. The present cross-sectional study investigated phonological encoding skills in dyslexic Danish students. We compared dyslexic and non-dyslexic students from grades 3, 5, 7, and 9 and examined whether effects of item length were stronger in the dyslexic groups. Mixed between-within subjects analyses of variance revealed significant interactions between dyslexia status and item length as the dyslexics at all grade levels were more affected by item length than their non-dyslexic peers. A marked developmental delay was apparent as the dyslexic group from grade 9 performed on approximately the same level as the non-dyslexic group from grade 3. Although the overall difference between these two groups was not significant, a significant interaction between dyslexia status and item length remained because the grade 9 dyslexics were more affected by item length than the younger non-dyslexic students. This difference in error profiles suggests a difference in the developmental patterns of dyslexic vs. non-dyslexic students. 相似文献