Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New system of scoring IQ tests benefits children with intellectual disabilities

16.12.2008
Researchers develop method which provides more accurate view of children's potential

Parents of children with intellectual disabilities have long been frustrated by IQ testing that tells them little to nothing about their children's long-term learning potential.

That's because the tests are scored according to the mean performance of children without disabilities, so the raw scores of many intellectually disabled children are converted to the lowest normalized score: typically a zero.

"We send back these reports that don't tell parents anything about their child," explained David Hessl, associate professor of clinical psychiatry at the University of California Davis M.I.N.D. Institute.

Now, Hessl and a team of collaborators have devised a new system of scoring IQ tests taken by children with fragile X syndrome, a genetic disorder that causes intellectual disabilities including autism. Their research has just been published online in Springer's Journal of Neurodevelopmental Disorders.

"If this new method becomes widely available, we will be able to tell parents something more useful and more accurately diagnose and treat young children who are learning disabled," said Hessl, a physician who cares for children with fragile X syndrome.

According to Hessl, there is a great deal of meaningful variability in the performance of children with intellectual disabilities on IQ tests. Frustrated by IQ tests' lack of sensitivity, Hessl set out to devise a scoring method that would reveal the strengths and weaknesses of each child.

"I knew a more accurate estimation of the potential of these children would make a big difference in their lives," he said.

Working with researchers at the M.I.N.D. Institute and Stanford University, as well as a statistician from Pennsylvania State University, the team came up with new normalized scores for 217 children with fragile X syndrome who had undergone IQ testing.

"The new scores tell us more precisely how a child with fragile X syndrome deviates from the normal population in every sub-test area," Hessl said.

Treatment of fragile X syndrome depends on its manifestations in the individual, and range from behavioral therapy to medication. Widespread use of new normalized scores would allow physicians to better treat their patients.

Hessl concluded, "In the future, the publishers of IQ tests should include lower functioning individuals in their standardization studies. This might mean over-sampling those with intellectual disability in order to get more sensitivity, but it would help so many children."

Reference
1. Hessl D et al. (2008) A solution to limitations of cognitive
testing in children with intellectual disabilities: the case of
fragile X syndrome. Journal of Neurodevelopmental Disorders. DOI
10.1007/s11689-008-9001-8

Joan Robinson | alfa
Further information:
http://www.springer.com

More articles from Science Education:

nachricht Starting school boosts development
11.05.2017 | Max-Planck-Institut für Bildungsforschung

nachricht New Master’s programme: University of Kaiserslautern educates experts in quantum technology
15.03.2017 | Technische Universität Kaiserslautern

All articles from Science Education >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Can we see monkeys from space? Emerging technologies to map biodiversity

An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.

Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...

Im Focus: Climate satellite: Tracking methane with robust laser technology

Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.

Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...

Im Focus: How protons move through a fuel cell

Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.

As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...

Im Focus: A unique data centre for cosmological simulations

Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.

With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...

Im Focus: Scientists develop molecular thermometer for contactless measurement using infrared light

Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine

Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Plants are networkers

19.06.2017 | Event News

Digital Survival Training for Executives

13.06.2017 | Event News

Global Learning Council Summit 2017

13.06.2017 | Event News

 
Latest News

Quantum thermometer or optical refrigerator?

23.06.2017 | Physics and Astronomy

A 100-year-old physics problem has been solved at EPFL

23.06.2017 | Physics and Astronomy

Equipping form with function

23.06.2017 | Information Technology

VideoLinks
B2B-VideoLinks
More VideoLinks >>>