SEPOCTDEC
19
201020112013
65 captures
19 Oct 2011 - 05 May 2021
About this capture
SCIENCE & ENVIRONMENT
19 October 2011 Last updated at 18:05
IQ 'can change in teenage years'
By David Shukman
Environment & science correspondent, BBC News
Intellectual performance can both improve and deteriorate in adolescence
Related Stories
Motivation 'key to high IQ score'
Is there a genius in all of us?
Lower IQ 'a heart disease risk'
The mental ability of teenagers can improve or decline on a far greater scale than previously thought, according to new research.
Until now the assumption has been that intellectual capacity, as measured by IQ, stays quite static during life.
But tests conducted on teenagers at an average age of 14 and then repeated when their average age was nearly 18 found improvements - and deterioration.
The findings are published in the journal Nature.
They have implications for how pupils are assessed, and the age at which decisions about their futures are made.
This study involved 19 boys and 14 girls, all undergoing a combination of brain scans and verbal and non-verbal IQ tests in 2004 and then in 2008.
The results show that a change in verbal IQ was found in 39% of the teenagers, with 21% showing a change in "performance IQ" - a test of spatial reasoning.
The findings are seen to have greater validity because for the first time the variations in IQ correlated with changes in two particular areas of the teenagers' brains.
An increase in verbal IQ corresponded with a growth in the density of part of the left motor cortex - a region activated during speech.
And an increase in non-verbal IQ correlated with a rise in the density of the anterior cerebellum - an area associated with movements of the hand.
The work was led by Professor Cathy Price of the Wellcome Trust Centre for Neuroimaging at University College London and is published in the journal Nature.
The paper suggests that the results could be "encouraging to those whose intellectual potential may improve and… a warning that early achievers may not maintain their potential".
Professor Cathy Price explains how teenage brains and IQs can change over time
Professor Price said: "We have a tendency to assess children and determine the course of their education relatively early in life.
"But here we have shown that their intelligence is likely to be still developing.
"We have to be careful not to write off poorer performers at an early age when in fact their IQ may improve significantly given a few more years."
The research did not seek to understand the causes of the changes.
One explanation is that teenagers mature at relatively different ages - with "early" and "late" developers - while relative standards in education may play a part too.
One of the participants, Sebastian Friston, now aged 23, recorded a marked increase in IQ between the two tests - from average to one of the highest categories.
Educated in the state sector, he told me he had struggled in his early years, needing remedial maths tuition, but is now planning a doctorate in computer engineering.
"I think the change came in school I started doing subjects that really interested me, that I was engaged in, then I found it easier and far more interesting."
The research was funded by the Wellcome Trust, one of many projects supported under its programme of Understanding the Brain.
Future work may focus on how adaptable the brain may be beyond teenage years, and the implications for tackling mental diseases and other neurological conditions.
More on This Story
Related Stories
Motivation 'key to high IQ score' 26 APRIL 2011, HEALTH
Is there a genius in all of us? 13 JANUARY 2011, MAGAZINE
Lower IQ 'a heart disease risk' 15 JULY 2009, HEALTH
Share this page
More Science & Environment stories
Scots carbon capture scheme scrapped
Plans for a pioneering carbon capture project at Longannet coal-fired power station have been scrapped, the UK energy secretary confirms.
'Broadband giant' heads skyward
Malaria vaccine trial raises hope
Top Stories
Police clear Dale Farm barricades
Greek clashes amid general strike
Undercover PC 'corrupted' trial
Woman killed in club 'stampede'
Fox attacks 'vindictive' media
Features & Analysis
Last bequest
I'm in my 20s, but is it time for me to make a will?
Child beggars
The route from London's streets back to families in Romania PANORAMA
Tumbleweedville
Why the sun set on an American town called Empire
Holy Flying Circus
Making a drama out of Monty Python
Most Popular
Shared
Read
Gervais 'mong joke' criticised
Police clear Dale Farm barricades
Town border sign hung upside down
Android shows Ice Cream Sandwich
Actress sues Amazon over her age
Woman killed in club 'stampede'
Undercover PC 'compromised' trial
Exotic animals on loose in Ohio
Tabak 'looked for sentence info'
7 questions on CVs
Video/Audio
Services
News feeds
Mobile
Podcasts
Alerts
E-mail news
About BBC News
Editors' blog
BBC College of Journalism
News sources
Mobile
About the BBC
BBC Help
Contact Us
Accessibility Help
Terms of Use
Careers
Privacy & Cookies
Advertise With Us
Ad Choices
BBC © 2011 The BBC is not responsible for the content of external sites. Read more.
HomeWorldUKEnglandN. IrelandScotlandWalesBusinessPoliticsHealthEducationSci/EnvironmentTechnologyEntertainment & Arts
DeliciousDiggFacebookredditStumbleUponTwitterEmailPrint
NewsSportWeatherTravelTVRadioMore