Showing posts with label Number-processing skills. Show all posts
Showing posts with label Number-processing skills. Show all posts

Tuesday, October 25, 2011

A Box of Many Ideas: Parents' Support Website for Dyslexia, Dyspraxia and DCD



The one stop shop for 1000s of ideas, guidance and information for parents of children who suffer from Dyslexia, Dyspraxia and /or DCD. 

The website boast that it provides guidance on everything from early years to employment. Click on the pictures to visit the website or follow the links below.


Practical skills and information for parents concerning Education, schools and employment



Practical skills that parents and carers can use at home or outside school time. 

Move 627 is a website that examines the transitional stages that children go through in their lives, offering information and support.

To learn more about supporting parents and children with Dyslexia, Dyspraxia, DCD, ADHD, etc., be sure to visit the website of Move627 and their sister site: www.dyscovery.co.uk

The websites are supported by Prof. Amanda Kirby: A registered Medical Practitioner who specialises in Community Paediatrics and Psychiatry. Prof Kirby has particular interest in Dyslexia, Dyspraxia and DCD and is currently the patron of the Dyspraxia Association in New Zealand and medical advisor to the Dyspraxia Foundation in the UK and Ireland.

She is also a medical advisor to a developmental disorders clinic in Singapore, the UK Neurofibromatosis Association and is on the Royal College of General Practitioners Learning Disability Working Party.

Tuesday, November 9, 2010

Number talk is important for preschool children

The amount of time parents spend talking about numbers has a much bigger impact on how young children learn mathematics than was previously known, researchers at the University of Chicago have found.

For example, children whose parents talked more about numbers were much more likely to understand the cardinal number principle–which states that the size of a set of objects is determined by the last number reached when counting the set (e.g., a set of 10 items is larger than a set of seven items).

“By the time children enter preschool, there are marked individual differences in their mathematical knowledge, as shown by their performance on standardized tests,” said University of Chicago psychologist Susan Levine, the Stella M. Rowley Professor in Psychology and the leader of the study. Other studies have shown that the level of mathematics knowledge entering school predicts future success.

The results of the study were published in the article, “What Counts in the Development of Young Children’s Number Knowledge?” in the current issue of Developmental Psychology. Joining lead author Levine in the study were four other scholars.

“The findings underscore the important role that caregivers can play in children’s early mathematical learning,” said Soo-Siang Lim, program director for the National Science Foundation’s Science of Learning Centers Program. NSF partially funded the research.

“The frequency with which parents’ talk with their toddlers about numbers, such as counting the number of objects in spatial arrays and labeling these set sizes, predicts their children’s understanding of numbers,” said Lim.

“These findings suggest that encouraging parents to talk about numbers with their children, and providing them with effective ways to do so, may positively impact children’s school achievement,” said Levine.

Wednesday, August 4, 2010

Dyscalcula and Number-processing skills in adults with dyslexia

Overall Summary of Scientific Study and Results
The present study investigated basic numerical skills and arithmetic in adults with developmental dyslexia. Participants performed exact and approximate calculation, basic numerical tasks (e.g., counting; symbolic number comparison; spatial-numerical association of response codes, SNARC), and visuospatial tasks (mental rotation and visual search tasks).

The group with dyslexia showed a marginal impairment in counting compared to age- and IQ-matched controls, and they were impaired in exact addition, in particular with respect to speed. They were also significantly slower in multiplication. In basic number processing, however, there was no significant difference in performance between those with dyslexia and controls. Both groups performed similarly on subtraction and approximate addition tasks.

These findings indicate that basic number processing in adults with dyslexia is intact. Their difficulties are restricted to the verbal code and are not associated with deficits in nonverbal magnitude representation, visual Arabic number form, or spatial cognition.

The Study details
It has long been recognised that language is a uniquely human ability. More recently it has been proposed that humans have an innate capacity to perceive numerosity, sometimes called the “number sense”.

The role of language in the development of human number representations (and hence mathematics) is debated. According to Dehaene's triple code model, three codes underpin our ability to process numbers and hence become numerate: a verbal code (linked to the language system); an analogue magnitude representation (underlying approximate calculation); and a visual code (linked to the Arabic number form).

Neuropsychological patients
Research on neuropsychological patients provides evidence for a double dissociation between language and number-processing systems, but this evidence does not imply that these systems develop independently.

From a developmental perspective, some theorists propose that language is essential for the development of numerical competencies, and there is evidence that the structure of the language system in which one grows up shapes the development of numerical concepts. Others, however, argue that numerical competence can develop independently of language.

Although less studied than reading difficulties, problems of mathematical development provide one way of understanding the relationships between language and number skills. Moreover, reading difficulties (RD) are often accompanied by problems with number work: Estimates of the overlap between reading difficulties and mathematical difficulties (MD) range from 2.3% to 40%.

Within the framework of the triple code model proposed by Dehaene, the most likely candidate for explaining the overlap between reading and mathematical difficulties is the verbal code. According to Dehaene, the verbal code is used most strongly for counting, for addition, and in multiplication tables, while approximate calculation and comparison as well as parity decision are supported more by the nonverbal codes.

Number-processing deficits in dyslexia
A number of clinical studies have documented the mathematical difficulties experienced by people with dyslexia.

Reviewing this literature, Simmons and Singleton concluded that the main difficulty is in recalling number facts. Thus, several studies report children with dyslexia to be slow at calculating or verifying sums.

Problems in multiplication and subtraction are common. Simmons and Singleton proposed that the mathematical difficulties observed in dyslexia might be related to phonological-processing deficits (that also cause reading and spelling problems).

Consistent with this, a number of studies have reported that phonological-processing abilities predict arithmetic impairment.

Contrary to this view, Landerl, Bevan, and Butterworth argue that learning to read and learning arithmetic are independent processes and that “fact retrieval is not, in essence, a verbally mediated process”.

The basis for their assertion came from a study of 8-9-year-old children with reading and/or arithmetic difficulties in which they classified children into three groups:

  • (a) children with dyslexia who did not have arithmetical difficulties (dyslexia-only);
  • (b) children with mathematical difficulties who did not have dyslexia (MD-only);
  • (c) children with dyslexia and MD.

NB: In tests of digit number naming, children with dyslexia-only performed at the same level as controls.

Children classified as having MD-only, however, had longer response latencies—indeed, even longer than those of the children with dyslexia and MD. They went on to argue that children with pure dyslexia do not experience number-processing deficits.

This conclusion needs to be treated with caution. First, the cut-offs used to define mathematical difficulties (3 standard deviations below the mean) and dyslexia (below the 25th percentile) were different, and the criterion used to define dyslexia was relatively lenient.

Second, it is not clear whether the dyslexia group had impairments in phonological processing. These issues limit the ability to generalise on the findings, and therefore the results may not be applied to all people with dyslexia.