In general, the difference among the psychometric theories of intelligence consists of:

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Psychometric theories of intelligence differ in how they describe the extent to which intelligence can be attributed to a general factor (g) and the nature of the lower-level factors. While some theories, such as the Spearman's two-factor theory, suggest that intelligence can be largely explained by g, others, like Cattell's theory, emphasize the role of specific abilities or factors. The other options do not accurately capture the differences among psychometric theories of intelligence.

In General, the Difference Among the Psychometric Theories of Intelligence