Table 5.

Table 5A. Linear model summaries, Stage 2 absolute. Key: Δ, change on IQ due to statistical effect; p, p-value. College graduation was the baseline for estimating statistical effects of parental education.
Male
	PIQ		VIQ		FSIQ
Effect	Δ	p	Δ	p	Δ	p
High School			−16.9	< 0.0001	−13.8	< 0.001
Some College			−10.3	0.001	−10.1	< 0.001
Frontal Lobe	3.0	0.004
Temporal Lobe					2.8	0.004

Female
	PIQ		VIQ		FSIQ
Effect	Δ	p	Δ	p	Δ	p
Income	3.0	0.001			2.2	0.024
Some College					−5.7	0.019
Temporal Lobe	2.3	0.014	4.6	0.022	5.2	0.004

Combined
	PIQ		VIQ		FSIQ
Effect	Δ	p	Δ	p	Δ	p
Income	2.1	0.009
High School			−13.0	< 0.0001	−10.3	< 0.0001
Some College			−7.9	< 0.0001	−7.4	< 0.0001
Temporal Lobe	2.7	<10−3			4.0	0.007

Table 5B. Linear model summaries, Stage 2 absolute. Key: Δ, change on IQ due to statistical effect; p, p-value. College graduation was the baseline for estimating statistical effects of parental education.
Male
	PIQ		VIQ		FSIQ
Effect	Δ	p	Δ	p	Δ	p
Income	3.3	0.001
High School			−17.3	< 0.0001	−13.2	< 0.001
Some College			−10.9	< 0.001	−9.5	0.001

Female
	PIQ		VIQ		FSIQ
Effect	Δ	p	Δ	p	Δ	p
Income	3.3	<10−3			2.5	0.014
Some College			−5.9	0.049	−6.3	0.012

Combined
	PIQ		VIQ		FSIQ
Effect	Δ	p	Δ	p	Δ	p
Sex	3.5	0.012
Income	2.3	0.005
High School			−13.5	< 0.00001	−10.8	< 0.0001
Some College			−8.4	< 0.0001	−7.8	< 0.0001