Table 7.

Multilevel models to test Hypotheses 7a and 7c

Predictors	Episodic memory			Executive functioning			BTACT composite
	Estimates	95% CI	P	Estimates	95% CI	p	Estimates	95% CI	p
Intercept (M2)	−0.44	−0.62 to −0.26	<0.001	−0.06	−0.18 to 0.06	0.340	−0.12	−0.23 to −0.00	0.046
MIDUS wave	−0.11	−0.24 to 0.03	0.122	−0.43	−0.50 to −0.35	<0.001	−0.38	−0.46 to −0.31	<0.001
Exponent	0.07	−0.38 to 0.52	0.748	0.16	−0.14 to 0.46	0.304	0.15	−0.13 to 0.43	0.290
Age	−0.02	−0.03 to −0.01	0.002	−0.02	−0.03 to −0.01	<0.001	−0.02	−0.03 to −0.01	<0.001
Sex	0.73	0.52 to 0.94	<0.001	0.11	−0.04 to 0.26	0.140	0.22	0.08 to 0.36	0.002
Education	0.16	0.04 to 0.29	0.010	0.13	0.05 to 0.21	0.002	0.13	0.06 to 0.21	0.001
Lag between waves	−0.10	−0.21 to 0.01	0.080	−0.22	−0.29 to −0.14	<0.001	−0.20	−0.27 to −0.13	<0.001
Wave × exponent	−0.14	−0.62 to 0.33	0.557	−0.23	−0.50 to 0.05	0.104	−0.19	−0.45 to 0.08	0.166
Wave × age	−0.01	−0.02 to 0.00	0.122	−0.00	−0.01 to 0.01	0.687	−0.00	−0.01 to 0.00	0.476
Exponent × age	−0.01	−0.06 to 0.04	0.677	0.01	−0.02 to 0.04	0.632	0.01	−0.02 to 0.03	0.695
Wave × exponent × age	0.03	−0.02 to 0.08	0.201	0.00	−0.02 to 0.03	0.755	0.00	−0.02 to 0.03	0.858
Random effects
σ 2	0.46			0.16			0.14
τ 00	0.39 M2ID			0.22 M2ID			0.19 M2ID
ICC	0.46			0.59			0.58
N	234 M2ID			235 M2ID			234 M2ID
Observations	451			458			443
Marginal R2/conditional R2	0.195/0.563			0.294/0.710			0.311/0.710

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).

Bold values are significant at p < .05.