Taxonomic separation of attention deficit disorders and developmental reading disorders

This investigation compared the behavior ratings and psychometric profiles of children with attention deficit disorders (ADD) and children with developmental reading disorders (DRD). ADD children showed no qualitative reading or spelling problems, although they were slightly behind expected levels of academic achievement. DRD children were significantly more impaired in academic attainment and showed evidence of qualitative disturbances in reading and spelling. DRD subjects did not differ from control subjects on ratings of hyperactivity, which was one of the defining variables of the ADD group. This evidence is interpreted as adding to a growing testimony that indicates that ADD and DRD are distinctly separate groups of disorders.     

快速命名与汉语发展性阅读障碍的研究综述

近年来快速命名与发展性阅读障碍的研究,主要讨论了快速命名对发展性阅读障碍产生预测性作用的主要原因:语音能力、正字法能力和任意性的形音联结.虽然鲜有研究涉及任意性的形音联结,但这个因素在形音关系不透明的汉语中,可能与阅读过程和快速命名都存在很大的相关性.今后应设立一个有效的统一的鉴别发展性阅读障碍儿童的标准,逐渐形成中文阅读发展的体系.     

Motor-perceptual function in children with developmental reading disorders: neuropsychophysiological analysis

The aim of this paper is to compare the motor performances and the movement-related macropotentials of 8 male children aged 10 years with developmental reading disorders with those of 9 nondisabled male children of the same age. The task employed consisted of initiating the sweep of an oscilloscope with a self-paced movement and terminating it within 50 +/- 10 msec. The children with reading disorders were slower, less accurate, and achieved a smaller number of target performances. Their brain macropotentials associated with motor programming, processing of sensory information, and evaluation of the results were altered in amplitude and latency. In the children with reading disorders, the systems involved in planning strategies and processing of sensory information are inadequate and those involved in the correction of errors are less efficient. Therefore, reading disorders could express defective integration and dysfunction of numerous processes occurring at different levels and times.     

Phonological knowledge and naming ability in children with reading disability

Children who are poor readers have difficulty naming pictured objects. Their naming difficulty could be a result of inadequate representations of the phonology of words, inadequate processing of those representations, or both. In this study, third-grade good and poor readers were tested on object naming, and, in cases of naming failure, forced-choice recognition tasks were used to probe their knowledge of the phonology of the object names. The two reading groups showed no differences in their ability to select the initial phonemes or rhymes of object names they had not produced spontaneously. Moreover, initial phoneme prompts were helpful for both reading groups. The children differed, however, in their ability to produce words after being given rhyme information. The results indicated that, except in the ability to manipulate explicitly phonological information, the poor readers; performance was qualitatively similar to that of the good readers. It is suggested that training in phonological analysis may help poor readers overcome the deficiencies in establishing and processing phonological representations that lead to their quantitative deficit in object naming.     

Differential risk for developmental reading disorders in the offspring of compensated versus noncompensated parents

When one or both parents have a history of developmental reading disorder (RD) in childhood, the risk to their offspring for developing reading problems is substantially increased. However, risk research has usually assumed a stability of reading problems across the lifespan (i.e., if a parent was affected in childhood, he or she remains affected in adulthood). Yet, some individuals with RD in childhood compensate for the disorder as they grow older. Both an environmental and genetic hypothesis would predict that the risk for RD in offspring will vary as a function of parental compensation. This study examined whether risk to offspring was dependent on the parents' successful or unsuccessful compensation for their childhood reading problems. Two large family data sets were analyzed (N=907). Diagnoses with either an age discrepant or IQ discrepant criteria essentially showed that having at least one still affected parent (i.e., RD both as a child and as an adult) put the offspring at a higher risk for RD than having at least one compensated parent (i.e., RD as a child but not as an adult). The lowest risk to an offspring occurred when both parents were never affected (i.e., not RD as a child or as an adult). The implications of these findings are discussed with regard to counseling and early diagnosis of reading problems.     

Rapid naming contributions to reading and writing acquisition of European Portuguese

This study analyzed the relation and the specific influence of rapid naming (RN) on different reading (decoding accuracy and reading fluency) and writing components (spelling accuracy and fluency in composition) of European Portuguese. Moreover, it also compares the influence of Rapid Automatized Naming (RAN) tests (colors, digits) and of a Rapid Alternating Stimulus (RAS) test (shapes and colors). In a sample composed by normally achieving children, 70 in the first grade and 69 in the second grade, the results show that, when phonemic awareness is controlled, RN is a significant concurrent predictor of reading and writing performance. Its impact occurs mainly on reading fluency and is carried out predominantly by the RAN digit test. Nevertheless, the RAN color test and the RAS shape and color test also significantly predicted reading and writing performance. The results also indicate that RN has less impact on writing than on reading, and that, when compared with phonemic awareness, it is associated with distinct written language components. When combined, the data obtained are consistent with the orthographic characteristics of European Portuguese.     

Phonemic awareness,naming, visual symbol processing,and reading

This study examined differences between adequate and poor readers in phonemic awareness, rapid continuous and confrontation naming, and visual symbol processing. It also investigated which of these skills make independent contributions to word recognition, pseudoword reading, and reading comprehension. Subjects were 170 school referrals of average intelligence, aged 6 to 10 years. The strongest differentiators of adequate and poor readers, with IQ and reading experience controlled, were phonemic awareness, naming speed for letters and pictured objects, and visual symbol processing. Letter naming speed made the largest independent contribution to word recognition, phonemic awareness to pseudoword reading, and object naming speed to reading comprehension. Confrontation picture naming accounted for minimal variance in reading skills, when IQ was controlled. It was concluded that tasks of naming speed, phonemic awareness, and visual symbol processing are valuable components of a diagnostic battery when testing children with possible reading disability.     

Rapid automatized naming,word-level reading,and oral reading fluency in first-grade Korean readers at risk for reading difficulties

This study was designed to investigate potential reading differences between low-achieving and typically achieving first-grade Korean-speaking children by (1) comparing their speed of lexical access on alphanumeric and non-alphanumeric tests of rapid automatized naming and (2) comparing relationships between the two groups’ performance on alphanumeric and non-alphanumeric tasks with their performance on component measures of reading. Twenty-seven low-achieving readers and 34 typically achieving readers participated in this study. The low-achieving readers performed significantly more slowly than their typically achieving reading peers on the four measures of rapid naming. The response rates for both alphanumeric naming tasks (digits and letters) showed strong negative correlations with oral reading fluency, while their response rates for the non-alphanumeric naming tasks (Color and Object naming) showed relatively weak relationships with reading measures for both groups. In regression equations, Letter naming tasks were uniquely associated with both word recognition and oral reading fluency. The utility of using alphanumeric naming tasks as indicators for identifying Korean Hangul readers who are at risk for reading disabilities is discussed.     

Rapid serial naming and reading ability: the role of lexical access

Rapid serial naming tasks are frequently used to explain variance in reading skill. However, the construct being measured by rapid naming is yet undetermined. The Phonological Processing theory suggests that rapid naming relates to reading because of similar demands of access to long-term stored phonological representations of visual stimuli. Some researchers have argued that isolated or discrete-trial naming is a more precise measure of lexical access than serial naming, thus it is likely that any shared variance between these two formats can be attributed to similar lexical access demands. The present study examined whether there remained any variance in reading ability that could be uniquely explained by the rapid naming task while controlling for isolated naming. Structural equation modeling was used to examine these relations within the context of the phonological processing model. Results indicated that serial naming uniquely predicted reading, and the relation was stronger with isolated naming controlled for, suggesting that isolated naming functioned as a suppressor variable in the relation of serial naming with reading.     

Rapid naming speed and reading across languages that vary in orthographic consistency

The objective of this study was to examine how rapid naming speed is related to reading ability across languages that vary in orthographic consistency. Forty English-speaking Canadian children, 40 Greek-speaking Cypriot children, and 40 Chinese-speaking Taiwanese children were administered RAN, reading accuracy, and reading fluency tasks in grade 4. The results revealed that across languages there were no statistically significant differences in the correlations between RAN and reading. However, a subsequent analysis of the RAN components—articulation and pause time—revealed that different RAN components may be responsible for the RAN-reading relationship across languages. Implications for existing theories relating RAN to reading are discussed.     

The role of naming speed within a model of reading acquisition

That symbol naming speed is an importantcorrelate of reading skill has been generallyacknowledged. Just what contribution it makesand why is a much more difficult question. Wesuggest that the search for such answers isbest developed within a broad model of readingskill acquisition. We propose an informalmodel and review evidence for several of itslinks. The major lines of influence arehypothesized to flow from cognitive abilities(mediated by instructional factors) tointermediate and final reading outcomes. Theoutcomes at each level, however, are affectedby outcomes at other levels, and in other wayscombine to complicate the picture. Use of sucha model may focus our research questions morefinely and lead to a more preciseconceptualization of the basis for naming speed– reading relationships.     

Genetic and environmental influences on rapid naming and reading ability: A twin study

The present study assesses the genetic and environmental etiologies of reading, rapid naming (RN), and their covariation by fitting multivariate structural equation models to data from 587 twin pairs in which at least one member of the pair exhibited reading difficulties (low-range) and from 360 control (normal-range) twin pairs who were tested in the Colorado Learning Disabilities Research Center. Results from a bivariate phenotypic analysis with two hypothesized latent factors, READ and RN, indicated that the correlation between reading and rapid naming performance for the low-range sample was significantly higher than that of the normal-range sample. When this model was partitioned to include estimates of genetic, shared environmental, and nonshared environmental influences, resulting heritability estimates did not differ significantly for the low-range and normal-range samples for either READ or RN. However, similar to the phenotypic correlation, the genetic correlation between the READ and RN latent factors could not be equated for the two groups. Thus, the etiology of the relationship between reading performance and rapid naming may differ for children with reading difficulties and normally-achieving readers. Moreover, these results support previous findings that the best predictors of reading skills may differ for samples of children with normal reading levels and those with reading difficulties.     

Eye movements of university students with and without reading difficulties during naming speed tasks

Although naming speed (NS) has been shown to predict reading into adulthood and differentiate between adult dyslexics and controls, the question remains why NS is related to reading. To address this question, eye movement methodology was combined with three letter NS tasks (the original letter NS task by Denckla & Rudel, Cortex 10:186–202, 1974, and two more developed by Compton, The Journal of Special Education 37:81–94, 2003, with increased phonological or visual similarity of the letters). Twenty undergraduate students with reading difficulties (RD) and 27 without (NRD) were tested on letter NS tasks (eye movements were recorded during the NS tasks), phonological processing, and reading fluency. The results indicated first that the RD group was slower than the NRD group on all NS tasks with no differences between the NS tasks. In addition, the NRD group had shorter fixation durations, longer saccades, and fewer saccades and fixations than the RD group. Fixation duration and fixation count were significant predictors of reading fluency even after controlling for phonological processing measures. Taken together, these findings suggest that the NS–reading relationship is due to two factors: less able readers require more time to acquire stimulus information during fixation and they make more saccades.     

A developmental approach to reading disability: accuracy and speed criteria of normal and deficient reading skill

The constructs of accuracy and speed were adopted as performance criteria against which to define 2 clinical samples of disabled readers. Accuracy-disabled subjects had failed to achieve reliable age-appropriate word recognition skills. Rate-disabled readers were age-appropriate in word recognition accuracy but deficient in reading speed. These disabled readers were compared to fluent normal children selected to be reading at the same level of accuracy as the rate-disabled subjects but at a significantly faster rate. All aspects of the accuracy-disabled subjects' reading systems proved deficient, and these children were less able to learn new sound-symbol associations in a task simulating initial reading acquisition. The rate-disabled subjects exhibited a basic deficit in word recognition speed, compromised accuracy when reading in context, and compromised spelling when competing visual patterns were available. A multidimensional oral language impairment was found to accompany the accuracy disability, while the rate disability appeared restricted to language in its visible form and the naming of visual representations. A visual naming speed impairment was associated with both profiles of deficient reading skill.     

Fitting derivational morphophonology into a developmental model of reading

Oral language is the foundation on which literacy initially builds. Between early developing oral language skills and fluent reading comprehension emerge several types of metalinguistic ability, including phonological and morphological awareness. In this study, a developmental sequence is proposed, beginning with receptive language followed by phonological awareness, morphological awareness, and a new metalinguistic task measuring oral morphophonological accuracy (MPA), followed by decoding and culminating in reading comprehension. MPA is a measure of accurate primary stress placement in the production of derived words with non-neutral, stress changing suffixes (e.g., -ity). A path analysis with data from 76 third graders was used to evaluate the direct and indirect effects of these variables. The developmental model was confirmed, and a metalinguistic continuum, with MPA emerging after both PA and MA, was supported. Decoding and receptive language were the best unique predictors of reading comprehension. Surprisingly, MPA was more important to decoding than was PA, whereas MA was only indirectly implicated in both decoding and reading comprehension.     

Subtyping of reading disorders: Implications for remediation

Present research methods do not seem to be leading us toward general agreement regarding reading disability subtypes. Even if there were agreement, conventional group research designs are not adequate for determining the optimal remedial procedure for each subtype. It is recommended that careful thought be given to the formulation of more appropriate theoretical frameworks and behavioral measures, and that single-subject research designs which yield information about subtypes and remediation effects be designed through collaboration of researchers and practitioners. Presented at the 33rd Annual Conference of The Orton Dyslexia Society, San Diego, California, November 1983.     

The relationship of rapid serial naming and word reading in normally developing readers: An exploratory model

Even though researchers have established that rapid serial naming (RSN), or the ability to name within a restricted category of visual stimuli quickly, is a significant predictor of word reading, the predictive nature of RSN is not well understood. To investigate the relationship of RSN and other variables thought to contribute to beginning word reading (phonological awareness, orthographic knowledge, memory span, processing speed, and articulation), a preliminary/exploratory model of word reading was developed and then tested by path analysis. Results indicated that no variable in the model could fully `explain' RSN; processing speed, but not articulation, contributed to RSN performance. RSN and orthographic knowledge were significantly related, but this relationship was due to the effects of processing speed. In terms of their unique contributions to the variance in word reading, RSN, phonological awareness, and orthographic knowledge were independent of each other. While these results pertain only to normal readers and are preliminary in nature, they may provide a basis for a clear interpretation of similar studies conducted with both normal and dyslexic readers.     

A developmental study of the relationship between reading development and the self-system

The aims of this three-year longitudinal study were to examine 1) the concurrent development of different components of the self-system; 2) how the development of this self-system relates to cognitive and metacognitive development in reading; and 3) whether or not there are gender differences both in the development of the self-system as well as in its relation to the development of reading. One hundred and seventy-eight elementary school children were first assessed in the fourth grade and then again in each of the two following years. A similar pattern of intercorrelations between self-system components was evident for boys and girls, and this pattern was quite stable across the three school grades. In addition, similar patterns of moderate relations between the self-system and cognitive and metacognitive development in reading were observed across time. According to these findings, there appears to be some stability, consistency and coherence in how late elementary school children’s beliefs about themselves as learners are organized in their self-system. It is also evident that children of this age are able to make valid self-appraisals of their capabilities.     

The Universal and the unique in dyslexia: A cross-linguistic investigation of reading and reading fluency in Hebrew-and English-speaking children with reading disorders

Cross-linguistic studies provide a unique tool for the identification of universal processes in oral and written language, both in development and in breakdown (Annual Review of psychology, 52, 369–396). Examining the differential strengths and weaknesses of children with dyslexia in contrasting orthographies can help illumine both the more universal aspects of reading disabilities, as well as their individual language-specific attributes. The aim of this study, was to investigate the shared and distinctive characteristics of readers with dyslexia on reading and reading fluency across Hebrew and English orthographies. Differences between 60 Hebrew and English-speaking children with dyslexia on a battery of cognitive, linguistic, and reading measures will be discussed along with theoretical implications.     

A clinical rationale for assessing rapid automatized naming in children with language disorders

Three continuous rapid naming tasks (Semel, Wiig, & Secord, 1995) were administered to 2,450 American, English-speaking, academically achieving individuals with typical language development and intellectual ability (ages 6 to 21 years) and 136 individuals with primary language disorders (LD; ages 6, 7, 9, 11, 12, 15-16). Naming time in seconds differed significantly (p < .01) between the groups for color naming (Task 1) at age 12, shape naming (Task 2) at age 6, and color-shape naming (Task 3) at ages 6, 7, 9, and 12. Naming accuracy did not differ significantly (p > .01) between groups at the majority of the age levels compared. In the normative group, naming speed increased with age in a monotonic progression. The developmental trajectory in the LD group was essentially parallel, but elevated. The percentages of individuals who failed the naming-time criteria for Task 3 (color-shape naming) differed significantly in the two groups at all ages compared (p < .05). These findings indicate that the requirements for two-dimensional, continuous naming (Task 3 color-shape naming) resulted in reduced naming speed (longer total times) and interference with fluency in language production in about half of the clinical sample.