Intelligence is one of the most misunderstood concepts imaginable. Contrary to popular belief, intelligence is not too complex to be summarised; researchers found a method of doing so over a century ago. It is not easily changeable after childhood and is largely inherited. Lastly, intelligence has important ramifications, ranging from life expectancy to criminality. Although there are myriad types of intelligence tests, researchers in this field have observed that the level of correlation between intelligence tests that purport to measure different aspects of cognitive ability is high. This correlation was labelled g and is now what scientists are referring to when discussing intelligence. G was first proposed by English psychologist Charles Spearman, in his paper "General Intelligence" Objectively Determined and Measured. Spearman examined the results of various tests of both crystallised and fluid intelligences and noted a significant correlation between seemingly unrelate...
Invention is drawn from ignorance.