What was Spearman's evidence in favor of a g factor in intelligence?
A)Certain genes are more common among people who score high on IQ tests.
B)Mean scores on IQ tests have been rising from one generation to the next.
C)Most people who do well on one mental test do well on other ones also.
D)Scores on IQ tests correlate positively with measurements of brain volume.

Question

What was Spearman's evidence in favor of a g factor in intelligence?​
A)Certain genes are more common among people who score high on IQ tests.
B)​Mean scores on IQ tests have been rising from one generation to the next.
C)​Most people who do well on one mental test do well on other ones also.
D)​Scores on IQ tests correlate positively with measurements of brain volume.

Quizplus · Accepted Answer

Spearman's evidence in favor of a g factor in intelligence is that most people who do well on one mental test do well on other ones also, indicating a general intelligence factor that underlies different cognitive abilities. This is known as the positive manifold. The other options are not directly related to Spearman's evidence of a g factor.

What Was Spearman's Evidence in Favor of a G Factor