Assertion: general ability | /r/HasProperty | single common measure
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Source sentences:
text: The theory of General Ability/Intelligence (or g) was introduced in 1904 by the English psychologist Charles Spearman, who concluded that general ability (g) is the single common measure to predict successful performance on a wide range of tasks, and though people could and usually do shine in certain/specific areas, he argued that there is indeed a broad mental capability, and that people who perform well in one area (e.g. verbal abilities), would probably perform successfully on other tests.