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1.
The purpose of this study was to examine verbal fluency and verbal short-term memory in 12 adults with Down syndrome (DS) and 12 adults with Intellectual Disability (ID) of unspecified origin, matched for receptive vocabulary and chronological age. Participants’ performance was assessed on two conditions of a verbal fluency test, namely, semantic and phonemic fluency. In addition to the total number of correct words produced, the use of clustering and switching strategies was also evaluated. In order to investigate the likely relations of verbal short-term memory with the test variables, a digit span task was administered. According to the results of the study, the two groups differed significantly on the average phonemic cluster size, with the ID group outperforming the DS group. Regarding the within-group comparisons, a relatively similar pattern of results was found for the two groups, indicating higher scores on all the measures involved in the semantic test than the phonemic one. The examination of the relation of verbal short-term memory with the verbal fluency test measures revealed that, in the DS group, only the total words produced in the semantic and the phonemic test and the number of phonemic switches were significantly associated with verbal short-term memory. Additionally, in both groups, word productivity in the semantic and the phonemic test was positively associated with the number of switches. The observed similarities and differences in the performance of the two groups, as well as the associations that emerged among the test variables in each group, are discussed.  相似文献   

2.
The present study explores the relationship between sentence recall and reading and language skills in a group of 7–11-year-old children with learning difficulties. While recent studies have found that performance on sentence recall tasks plays a role in learning, it is possible that this contribution is a reflection of shared resources with working memory. In order to investigate whether sentence recall was uniquely associated with reading and language skills, differences associated with IQ and working memory capacity were statistically controlled. A sample of 72 children was tested on measures of verbal complex memory, verbal short-term memory, sentence recall, expressive vocabulary, verbal and performance IQ, reading and language skills. Both sentence recall and verbal complex memory shared unique links with reading skill, and sentence recall was uniquely associated with language skills. This finding indicates that resources in long-term memory also play an important diagnostic role in reading and language abilities. The implications for educational practice are discussed.  相似文献   

3.
The aim of the current study was to further explore the connection between verbal short-term recall and phonological processing for two purposes: (a) To investigate the basis of short-term memory deficits for children with reading disability, and (b) To further explore the origin of developmental verbal memory span increases.Using a variety of memory and phonological tasks, reading group comparisons were conducted testing third-grade good readers and poor readers, and developmental changes were studied with pre-kindergarten, first-grade and third-grade children. The main finding was that a strong relationship was observed between efficiency of phonological processes and capacity of verbal memory supporting the hypothesis that reducing phonological processing requirements in verbal short-term memory increases available resources for storage. No such relationship was found between phonological processing and nonverbal memory. This conclusion was supported by two findings: (a) The verbal short-term memory deficits in poor readers significantly correspond with less accurate phonological processing, and (b) Developmental increases in verbal STM are accompanied by more accurate and rapid execution of phonological tasks.  相似文献   

4.
Verbal short-term memory deficits are a common characteristic of children with reading problems and may markedly increase the difficulty of learning to read. Previous work suggests that the basis of the short-term memory deficit may involve limitations in phonetic coding. In the present paper, a series of experiments are reviewed which examined the role of phonological processes in short-term memory. First, a developmental study is described in which a significant relationship was found between phonetic processes and verbal memory span, but not between phonetic processes and nonverbal memory. Second, additional studies are reviewed which collectively found that children with reading problems are less accurate at phonetic encoding than are good readers, and that performance on phonetic processing corresponds with verbal memory span. No reading group differences were obtained on nonverbal perception or memory tasks. These findings suggest that both developmental and individual differences in verbal memory span are related to the efficiency of phonological processes. Practical implications of current cognitive research are discussed. The research was supported by NIH Grant HD-01994 to Haskins Laboratories.  相似文献   

5.
The Development of Memory and Processing Capacity   总被引:1,自引:0,他引:1  
The assumption of some developmental theories that short-term memory is the workspace of higher cognitive processes, and consequently that span measures processing capacity, is claimed to be inconsistent with the working memory literature. 4 experiments, using children aged 5 to 12 years, contrast this theory with a model in which short-term memory and the processing space component of working memory are at least partly distinct. Experiments 1 and 2 varied processing load, holding duration constant. The processing load manipulation had little effect on recall of a short-term memory preload. Experiments 3 and 4 failed to support the prediction that the greater processing efficiency of older children would be associated with slower loss of information from short-term memory. Although counting and rehearsal rates increased with age, and correlated with span, they did not predict the rate of loss of memory preload due to intervening counting. The data suggest that effects obtained with short-term memory span do not provide clear indications of overall working memory development, because short-term memory span and the processing space component of working memory entail distinct systems.  相似文献   

6.
We investigated temporal resolution of auditory perception (TRAP), verbal working memory, and speech perception in 15 children with language impairment (LI) in comparison with a control group of 99 typical children. A computerized two-choice test was used to assess these three abilities. No deficits in TRAP were found in the LI group, and the thresholds were similar for both study groups. It was interesting that the variability was high for both groups and that the control group's performance was poorer than reported in some previously published studies. There were significant differences in the two groups' performance on speech perception and verbal working memory. Working memory was the most sensitive of these two measures.  相似文献   

7.
小学数学学习困难儿童的工作记忆广度研究   总被引:1,自引:0,他引:1  
对数学学习困难儿童的工作记忆广度进行研究,结果发现数学学习困难儿童在言语和视觉空间工作记忆广度上都显著低于正常儿童,但这种不足主要是一种发展的延迟。对有无伴随阅读困难的数学学习困难儿童进行比较,发现二者的言语和视觉空间工作记忆广度都没有表现出显著差异。  相似文献   

8.
The present study focuses on the short-term effects of electronic entertainment media on memory and learning processes. It compares the effects of violent versus non-violent computer game content in a condition of playing and in another condition of watching the same game. The participants consisted of 83 female and 94 male adolescents with a mean age of 17.6 years. The dependent variables are memory for previously learnt verbal and visual material, memory for media-related content and physiological measures of stress (heart rate, cortisol, salivary alpha-amylase). Besides the group comparisons, potential mediation effects and gender differences were examined. The results show that violent content leads to a poorer memory performance for verbal material and to an increased heart rate. The heart rate, however, does not mediate the effect on memory performance. Genders differ regarding their abilities to memorise verbal and visual material, with females showing a better performance (independent of the experimental condition), and for memorising media-contents, where the males outperform females (also independent of experimental condition). The study supports the assumption that violent and arousing media content has a negative short-term effect on simultaneous information processing and learning and that there are gender-specific media effects.  相似文献   

9.
The acknowledgement that educational achievement is highly dependent on successful reading development has led to extensive research on its underlying factors. A strong argument has been made for a causal relationship between reading and phoneme awareness; similarly, causal relations have been suggested for reading with short-term memory and rhyme awareness alike. Here a meta-analysis is presented that seeks to determine spuriousness in these factors' relationships with reading by examining each factor's unique predictive value. The results show that phoneme awareness is the strongest unique predictor. Since the meta-analysis is based on concurrent data, it is unsuited to enlighten time-order relationships, but longitudinal and experimental studies both support the notion of a causal relationship between phoneme awareness and reading, in contrast to rhyme awareness and verbal short-term memory.  相似文献   

10.
《教育心理学家》2013,48(3):109-121
Relations between phonological processing and speech perception skills in reading-disabled children and adults are considered. Following Wagner and Torgesen (1987), phonological processing is comprised of at least three distinct though interrelated abilities--phonemic awareness, phonological recoding in lexical access, and short-term verbal memory skills. Speech perception skills may also represent two domains, speech perception and short-term memory. Studies of speech perception and word reading are critiqued. The interactions of speech perception, phonological processing skills, and word-reading abilities with development are considered in a preliminary model of reading. Although studies of phonological processing and speech perception in poor readers have thus far developed separately, experimenters in these isolated domains could benefit from the research findings in each and the unique paradigms each uses to investigate deficits in poor readers.  相似文献   

11.
Models of Speech Perception and Phonological Processing in Reading   总被引:7,自引:0,他引:7  
Multiple measures of speech perception, phonological awareness, naming speed, verbal short-term memory, and word reading were concurrently administered to 136 third- and fourth-grade children. Structural equation modeling was used to contrast 5 models of the relations of speech perception and phonological processing skills to reading with IQ controlled. The best-fitting model, the Indirect Model, was one in which the effect of speech perception on reading was mediated by its relations with phonological processing abilities. Naming speed was particularly highly associated with speech perception, possible evidence for the Motor Theory. Phonological awareness was also substantially correlated with speech perception.  相似文献   

12.
The aim of this study was to compare visual and verbal memory in children with nonverbal learning disability (NLD) using the Children's Memory Scale and to identify the profile of strengths and weaknesses in visual memory abilities. Performance was significantly lower on measures of visual than verbal memory, indicating that children with NLD have deficits in visual memory despite adequate verbal memory. A unique pattern of performance emerged for the visual but not the verbal subtests. Performance on the Faces Immediate subtest was well below average, although other measures of visual memory were within the average range. Hence, it appears that children with NLD have a specific deficit on immediate memory for faces. This facial memory deficit may be linked to a deficit in right hemisphere functioning, which has already been implicated in facial processing and may also be linked with other disorders (e.g., autism spectrum disorder) in which similar facial processing deficits have been documented. More research is needed to further understand the visual memory profile of children with NLD and to inform instruction and remediation.  相似文献   

13.
We investigate the effects of age-related factors and formal instruction on the development of reading-related skills in children aged 4 and 7 years. Age effects were determined by comparing two groups of children at the onset of formal schooling; one aged 7 (later-schooled) and one aged 4 (earlier-schooled). Schooling effects were measured by comparing the later-schooled group with earlier-schooled age-matched controls. There were significant effects of age and schooling on phonological awareness and visual–verbal learning, and an effect of age, but not schooling, on vocabulary and short-term verbal memory. We conclude that age-related factors and reading instruction contribute to the development of phoneme awareness and that vocabulary and verbal memory improve with age.  相似文献   

14.
Metalinguistic and literacy abilities were studied in twenty-seven nonvocal cerebral palsied school children. The participants of the study were presented four tests of phonological awareness: rhyme recognition, sound identification, phoneme synthesis and word length analysis. Their verbal comprehension was measured using a semantic and a syntactic task. Two tests of nonverbal memory: the visual sequential task from ITPA and Corsi blocks and the Digit Span task from WISC, were also included. These measures were related to their reading and spelling ability. The nonvocal children performed on a lower level on the reading and spelling tasks than did the children of two comparison groups, one matched for mental age and one for mental and chronological age. There were no differences in phonological awareness or in verbal memory. The disabled children performed worse on the verbal comprehension task than the children in the comparison groups. Although the reading and spelling results were low in the nonvocal group there were children showing some literacy skills. A within-group analysis performed in the nonvocal group showed that the reading children performed better on all memory tests, and on the sound identification and the word length analysis tasks than the nonreading ones. They also showed better results on verbal comprehension, the semantic task and used more symbols in their communication. Synthetic speech was more often used in reading and spelling education in the reading subgroup than in the nonreading. Metalinguistic abilities and possibility of acoustic rehearsal are discussed as important factors in reading and spelling acquisition in the nonvocal population.  相似文献   

15.
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   

16.
In previous studies of memory span, participants have attended to the stimuli while they were presented, and therefore have had the opportunity to use a variety of mnemonic strategies. In the main portion of the present study, participants (first- and fourth-grade children, and adults; 24 per age group) carried out a visual task while hearing lists of spoken digits and received a post-list digit recall cue only occasionally, for some lists. Under these conditions, list information presumably must be extracted from a passively held store such as auditory sensory memory. The results suggest that each individual has a core memory capacity limit that can be observed clearly in circumstances in which it cannot be supplemented by mnemonic strategies, and that the capacity limit appears to increase with age during childhood. Other, attention-demanding processes also contribute to memory for attended lists.  相似文献   

17.
In this review, a new model that is grounded in information-processing theory is proposed to account for gender differences in spatial ability. The proposed model assumes that the relative strength of working memory, as expressed by the ratio of visuospatial working memory to verbal working memory, influences the type of strategies used on spatial ability tasks. Strategy use, in turn, influences performance on spatial ability tasks. Gender differences in spatial ability can be explained by gender differences in strategy use as a function of the relative strength of visuospatial working memory to verbal working memory.  相似文献   

18.
We assessed the reading and reading-related skills (phonemic awareness and phonological short-term memory) of deaf children fitted with cochlear implants (CI), either exposed to cued speech early (before 2 years old) (CS+) or never (CS-). Their performance was compared to that of 2 hearing control groups, 1 matched for reading level (RL), and 1 matched for chronological age (CA). Phonemic awareness and phonological short-term memory were assessed respectively through a phonemic similarity judgment task and through a word span task measuring phonological similarity effects. To assess the use of sublexical and lexical reading procedures, children read pseudowords and irregular words aloud. Results showed that cued speech improved performance on both the phonemic awareness and the reading tasks but not on the phonological short-term memory task. In phonemic awareness and reading, CS+ children obtained accuracy and rapidity scores similar to CA controls, whereas CS- children obtained lower scores than hearing controls. Nevertheless, in phonological short-term memory task, the phonological similarity effect of both CI groups was similar. Overall, these results support the use of cued speech to improve phonemic awareness and reading skills in CI children.  相似文献   

19.
This study assesses information processing and memory functioning in 50 children diagnosed with Attention Deficit Hyperactive Disorder (ADHD) with and without learning disabilities (LD). Mode of presentation (visual vs. auditory), type of memory processing (immediate, short-term, and long-term), and order of recall (ordered vs. unordered) were assessed using the Learning Efficiency Test-II (LET-II). Both groups demonstrated difficulty with auditory ordered recall and lost substantial information from immediate memory to short-term and long-term memory stores. The ADHD/LD group also demonstrated more difficulty with ordered recall than the ADHD only group. While there were no differences between the two groups in regard to immediate recall, the ADHD/LD group demonstrated more problems transferring information into short-term and long-term memory stores than the ADHD only group. Verbal interference effects significantly decreased retention for both visual and auditory processing. Results indicate that ADHD alone presents significant problems in information processing, but the comorbid effects of a learning disability further intensify the negative impact of ADHD. © 1996 John Wiley & Sons, Inc.  相似文献   

20.
This study tested the hypothesis that phonological analysis skills make a unique contribution to reading ability against the hypothesis that one latent phonological factor underlies the assocations among analysis skills, verbal working memory skills, and reading achievement. Hierachical multiple regression analyses examined the unique contributions of phonological analysis and verbal working memory measures to the prediction of 3 measures of concurrent reading ability in 68 second-grade children (mean age 7 years 4 months). Phonological analysis and verbal working memory measures each accounted for unique variation in each of the 3 reading measures. In addition, phonological analysis measures, but not verbal working memory measures, were particularly strong predictors of pseudoword reading skills. These results suggest that, although phonological analysis and verbal working memory skills share a substantial amount of common variance, phonological analysis and verbal working memory tasks do tap somewhat different reading-related skills.  相似文献   

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