Table 1.

Mean ± standard error of the mean of self-reported positive and negative affect and after-effects as observed in both sessions.

	Sham	Active
Positive affect	36.35 ± 0.64	36.35 ± 0.66
Negative affect	20.68 ± 0.76	20.33 ± 0.76
Headache	1.37 ± 0.09	1.32 ± 0.07
Neck pain	1.15 ± 0.07	1.20 ± 0.06
Nausea	1.10 ± 0.04	1.17 ± 0.06
Muscle contractions	1.18 ± 0.07	1.30 ± 0.09
Stinging sensation	3.35 ± 0.17	3.42 ± 0.17
Burning sensation	2.27 ± 0.17	2.27 ± 0.17
Generic uncomfortable feeling	2.18 ± 0.16	2.38 ± 0.15
Accuracy reporting stimulation type*	0.27 ± 0.06	0.50 ± 0.06