Physiological Evidence that Demand for Processing Capacity Varies with Intelligence
Spearman, in proposing his influential two-factor theory of intelligence, adopted an implicit biological model which was untestable in his time. Spearman suggested both a general factor of intelligence (g), which corresponded to the amount of “general mental energy” available to an individual for information processing, and a set of specific ability factors, which were brain systems or “mental engines” drawing upon the general energy pool (Spearman, 1904).
KeywordsDigit Span Processing Capacity Processing Resource Sentence Comprehension Pupillary Response
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