TABLE 2.

Reported adverse effects after anodal, cathodal, and sham HD-tDCS stimulation.

	Anodal	Cathodal	Sham	ANOVA
Headache	0.32 ± 0.16	0.72 ± 0.32	0.63 ± 0.37	F2,46 = 0.64, p = 0.504, ${\mathrm{\eta }}_p^2=0.027$
Neck pain	0.08 ± 0.08	0.36 ± 0.18	0.13 ± 0.09	F2,46 = 1.33, p = 0.274, ${\mathrm{\eta }}_p^2=0.055$
Scalp pain	1.56 ± 0.39	1.44 ± 0.41	1.50 ± 0.33	F2,46 = 0.32, p = 0.718, ${\mathrm{\eta }}_p^2=0.014$
Tingling	2.92 ± 0.46	3.24 ± 0.49	2.96 ± 0.59	F2,46 = 0.35, p = 0.658, ${\mathrm{\eta }}_p^2=0.015$
Itching	3.24 ± 0.61	3.80 ± 0.59	2.63 ± 0.59	F2,46 = 2.71, p = 0.082, ${\mathrm{\eta }}_p^2=0.105$
Burning sensation	0.44 ± 0.19	1.88 ± 0.50	0.88 ± 0.44	F2,46 = 5.41, p = 0.010, ${\mathrm{\eta }}_p^2=0.191$
Skin redness	0.16 ± 0.11	0.68 ± 0.33	0.50 ± 0.30	F2,46 = 0.66, p = 0.462, ${\mathrm{\eta }}_p^2=0.028$
Sleepiness	2.84 ± 0.40	2.16 ± 0.37	2.92 ± 0.42	F2,46 = 2.49, p = 0.107, ${\mathrm{\eta }}_p^2=0.098$
Trouble concentrating	2.24 ± 0.38	2.24 ± 0.49	2.13 ± 0.51	F2,46 = 0.01, p = 0.978, ${\mathrm{\eta }}_p^2=0.001$
Acute mood changes	0.44 ± 0.22	0.68 ± 0.34	0.67 ± 0.36	F2,46 = 0.22, p = 0.733, ${\mathrm{\eta }}_p^2=0.009$

Data are expressed as mean ± SEM. Statistics were obtained by applying one-way repeated measures ANOVA with one factor of “Type” (anodal, cathodal, and sham HD-tDCS).