Table 1.

Mean subjective ratings (standard deviation) for the stimulation side effects in the active and sham condition.

	tVNS	Sham
Headache	1.5 (1.5)	1.85 (1.18)
Nausea	1.2 (0.61)	1.23 (0.55)
Dizziness	1.55 (0.6)	1.7 (1.13)
Neck pain	1.5 (0.2)	1.3 (0.47)
Neck contraction	1.6 (0.95)	1.7 (0.93)
Stinging sensation	2.87 (2.07)	1.95 (1.39)
Ear irritation	1.8 (1)*	1.15 (0.49)
Concentration	3.55 (1.73)	3.45 (1.7)
Fluctuation of feelings	1.65 (0.88)	1.37 (0.81)
Unpleasant feelings	1.94 (1.13)	1.65 (1.04)

N = 20; *p < 0.05.