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Charles Spearman & General Intelligence
General Intelligence is defined as "a general intelligence factor that Spearman and others believed underlies specific mental abilities and is therefore measured by every task on an intelligence test."
Spearman noticed that people often have special abilities that stand out and when they score high in a certain subject, they typically score high in related subjects. General intelligence is also referred to as "g factor" and Spearman used a technique called factor analysis to determine the scores of the these tests. After studying general intelligence, Spearman concluded that intelligence is a cognitive ability that can be measured and numerically expressed. |
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Spearman studied how people that scored high in certain subjects tend to score high in the subcategories of those subjects. For example, if a individual scored high in Verbal Reasoning, they also scored high in Vocabulary Comprehension.
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Text Sources:
Psychology Textbook by David G. Meyers
Psychology Textbook by David G. Meyers