Suppose someone demonstrated that there are several kinds of intellectual abilities that correlate poorly or negatively with one another. That demonstration would be evidence against

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The demonstration of poor or negative correlation between different intellectual abilities would go against Spearman's theory of a general factor (g) underlying all cognitive abilities. The other three options do not necessarily rely on the assumption of a single general factor, so the evidence would not be as directly contradictory for those theories.

Suppose Someone Demonstrated That There Are Several Kinds of Intellectual