Table 2.

Descriptive statistics of performance changes relative to sham (N = 48)

Variable	PPC			DLPFC
	M	SD	95% CI	M	SD	95% CI
Capacity difference (ΔK)
Set size 2	−0.02	0.09	[−0.04, 0.01]	−0.02	0.11	[−0.05, 0.01]
Set size 4	−0.01	0.44	[−0.13, 0.12]	−0.06	0.49	[−0.20, 0.08]
Set size 6	−0.14	0.72	[−0.35, 0.07]	0.00	0.88	[−0.25, 0.26]
Precision difference (ΔSD−1)
Set size 2	−0.00	0.01	[−0.01, 0.00]	0.00	0.01	[−0.00, 0.00]
Set size 4	−0.00	0.01	[−0.00, 0.00]	−0.00	0.01	[−0.00, 0.00]
Set size 6	−0.00	0.02	[−0.01, 0.00]	−0.00	0.01	[−0.01, 0.00]

Capacity ranges from 0 to the set size; precision ranges from 0 to ∞.

M mean, SD standard deviation, CI confidence interval on the mean value, PPC right posterior parietal cortex, DLPFC left dorsolateral prefrontal cortex.