Table 5.

Hierarchical Regression Analyses of Latent Factor Scores

Construct	Model		ΔR2	ΔF	β	t
	Step 1:	Age	.64	251.64**	−.80	15.86**
Processing Speed	Step 2:	Age	.05	20.38**	−2.16	−7.07**
		Age × Age			1.38	4.51**
	Step 1:	Age	.60	217.95**	−.78	−14.76**
	Step 2:	Age	.06	23.86**	−2.30	−7.28**
		Age × Age			1.54	4.88**
	Step 1:	Processing Speed	.89	1233.94**	.95	35.13**
Response Inhibition	Step 2:	Processing Speed	.001	1.72	.90	20.20**
		Age			−.06	−1.31
	Step 3:	Processing Speed	.003	3.53	.87	18.40**
		Age			−.43	−2.12*
		Age × Age			.35	1.88
Working Memory	Step 1:	Age	.40	95.06**	−.63	−9.75**
	Step 2:	Age	.04	9.81*	−1.89	−4.65**
		Age × Age			1.27	3.13*
	Step 1:	Processing Speed	.73	402.11**	.86	20.05**
	Step 2:	Processing Speed	.01	4.44*	.98	13.92**
		Age			.15	2.11*
	Step 3:	Processing Speed	.000	.08	.98	13.08**
		Age			.24	.74
		Age × Age			−.08	−.28

Note: Age denotes the linear effect of age. Age × Age denotes the quadratic effect of age.

^**p < .001,

^*p < .05