IQ science & IQ facts

How to define intelligence? fluid G & crystallized G

General intelligence (G) can be factored into fluid intelligence (Gf) and crystallized intelligence (Gc). Both define intelligence and both are measured by IQ tests, often in a combined score.

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   Scientific IQ Testing

Can your intelligence be measured?

Yes. Intelligence can be measured, and a standardized IQ test measures it well. IQ tests are regarded as the most accurate of all psychological tests and assessments. 

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Fake Science Warning: Beware of the hype!

There are many bogus science claims about boosting IQ in the 'brain training' and 'smart drugs' industries that have no genuine scientific basis. Many products come 'highly recommended' - with many user recommendations to create a positive impression. But recommendations can be misleading. Many of the claims are based on fake science.

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  IQ Lift Science References

IQ  Lift 's brain training software

Jaeggi, S.M., Buschkuehl, M., Jonides, J., &  Perrig, W.J. (2008). Improving Fluid Intelligence with Training on Working Memory, Proc Natl Acad Sci USA, 105: 6829–6833 .

Sternberg, R. J. (2008). Increasing fluid intelligence is possible after all. Proc Natl Acad Sci USA, 105, 19:  6791–6792.

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