Table 1.

Training Data as a Function of Intervention Group and Spacing Condition

	Every other day		Every day		Twice per day		Main effect (spacing)
	Mean	SD	Mean	SD	Mean	SD	p	BF	η 2 p
Working memory-training group	N = 26		N = 24		N = 28
Number of sessions	19.46	2.14	20.46	2.13	21.61	3.78
Range of sessions	14–26		17–26		14–29
Average first two sessions	2.25	0.45	2.39	0.35	2.44	0.42	.24	0.35	.04
Average last two sessions	2.65	0.53	2.91	1.10	2.88	0.50	.39	0.23	.03
Overall gain	0.39	0.41	0.52	0.97	0.44	0.41	.79	0.13	.01
Linear regression
Overall slope	0.02	0.02	0.03	0.05	0.01	0.02	.37	0.24	.03
Intercept	2.39	0.47	2.57	0.48	2.64	0.39	.13	0.58	.05
Spline regression
First slope	0.21	0.25	0.40	0.43	0.27	0.24	.09	0.73	.06
Change from first slope	−0.18	0.29	−0.41	0.39	−0.29	0.27	*	1.20	.08
Second slope	0.03	0.09	0.00	0.07	−0.01	0.13	.35	0.26	.03
Knot location	6.20	3.91	4.75	3.14	5.48	3.74	.38	0.24	.03
Knowledge-training group	N = 25		N = 24		N = 28
Number of sessions	20.36	1.85	19.88	1.70	21.29	3.54
Range of sessions	15–25		16–26		13–30
Average first two sessions	5.31	1.10	5.14	1.38	5.50	1.32	.61	0.17	.01
Average last two sessions	7.07	1.83	6.74	2.25	7.18	2.19	.73	0.14	.01
Overall gain	1.77	1.27	1.59	1.10	1.68	1.25	.88	0.12	.00
Linear regression
Overall slope	0.08	0.06	0.07	0.05	0.06	0.05	.56	0.18	.02
Intercept	5.85	1.37	5.57	1.86	6.14	1.86	.49	0.20	.02
Spline regression
First slope	1.54	1.39	1.45	1.87	1.88	1.54	.61	0.17	.01
Change from first slope	−1.61	1.38	−1.47	1.88	−1.77	1.68	.81	0.13	.01
Second slope	−0.07	0.45	−0.02	0.26	0.10	0.29	.18	0.43	.05
Knot location	5.12	4.07	5.63	4.19	4.37	3.68	.53	0.19	.02

Note: BF = Bayes factors. BF above 1 (in bold) are considered evidence in favor of the alternative hypothesis. *P = .05.