Im Jahr 2004 wurden 33 Kinder im Alter von 12 bis 16 unter zuhilfenahme eines MRI Scans getestet. Als dieser Test 4 Jahre später wiederholt wurde, zeigten sich teils enorme Unterschiede von bis zu 20 Punkten.
"We found a considerable amount of change in how our subjects performed on the IQ tests in 2008 compared to four years earlier," explains Sue Ramsden, first author of the study. "Some subjects performed markedly better but some performed considerably worse. We found a clear correlation between this change in performance and changes in the structure of their brains and so can say with some certainty that these changes in IQ are real."
An increase in verbal IQ score correlated with an increase in the density of grey matter -- the nerve cells where the processing takes place -- in an area of the left motor cortex of the brain that is activated when articulating speech. Similarly, an increase in non-verbal IQ score correlated with an increase in the density of grey matter in the anterior cerebellum, which is associated with movements of the hand. However, an increase in verbal IQ did not necessarily go hand-in-hand with an increase in non-verbal IQ.Brain Scans Support Findings That IQ Can Rise or Fall Significantly During Adolescence @ Science Daily
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