General Intelligence(一般智力)

Charles Spearman made "g" stand for a statistical measure of performance across a variety of test.

He found that the same people who did well in a variety of mental test tended to use a part in their brains that he termed "g".

The "g" laid the foundation for the notion of a single intelligence, allowing us to undertake everyday mental task.

A recent study seems to confirm C.Speraman's theory. Research has foun that a part of the brain called the " lateral prefrontal cortex" is the only area of the brain to increase in blood flow when volunteers tackle complicated puzzles.

(當某人在處理困難的問題時, 外側前額葉皮層是大腦區域裡唯一會加強血液流量的區塊)

※Charles Spearman利用統計方法推論人類智力理論的二種因素(two-factor theory), 一種是一般心裡能力, 也就是"g", 一種是特殊能力, 也就是"s", 而Spearman的重於強調"g", 因此將他的理論概念被稱單一智力(single intelligence)。