Table 6:

Multilevel models to test hypothesis 5 and 6

	Episodic Memory			Executive Functioning			BTACT Composite
Predictors	Estimates	CI	p	Estimates	CI	p	Estimates	CI	p
Intercept (M2)	−0.40	−0.57 – −0.22	<0.001	−0.03	−0.16 – 0.09	0.596	−0.09	−0.21 – 0.03	0.146
MIDUS Wave	−0.13	−0.25 – 0.00	0.052	−0.43	−0.51 – −0.36	<0.001	−0.38	−0.45 – −0.31	<0.001
IAPF	0.12	−0.00 – 0.25	0.055	0.07	−0.02 – 0.16	0.115	0.08	−0.00 – 0.16	0.058
Sex	0.68	0.47 – 0.89	<0.001	0.06	−0.10 – 0.21	0.469	0.16	0.02 – 0.31	0.030
Education	0.17	0.05 – 0.30	0.007	0.14	0.05 – 0.22	0.002	0.13	0.05 – 0.21	0.001
Lag between Waves	−0.06	−0.17 – 0.06	0.326	−0.17	−0.26 – −0.09	<0.001	−0.16	−0.24 – −0.08	<0.001
Wave × IAPF	0.07	−0.06 – 0.20	0.281	0.07	−0.00 – 0.15	0.061	0.07	0.00 – 0.14	0.047
Random Effects
σ2	0.47			0.15			0.13
τ00	0.42 M2ID			0.28 M2ID			0.25 M2ID
ICC	0.47			0.64			0.65
N	234 M2ID			235 M2ID			234 M2ID
Observations	451			458			443
Marginal R2 / Conditional R2	0.156 / 0.553			0.188 / 0.711			0.196 / 0.715

Note: Repeated measured cognitive data nested within participant, indicated by M2ID. Sex coded as 0 = male, 1 = female. Education coded as −1 = high school or less, 0 = some college, 1 = Bachelor’s degree or higher. MIDUS Wave coded as 0 = MIDUS 2, 1 = MIDUS 3. Years between Waves (i.e., between MIDUS 2 and MIDUS 3 Cognitive Projects) and Age at M2 Neuroscience Project are mean centered. Empirical Bayes slope estimation used (Bates et al., 2015).