Table 2.

Number of participants (out of n = 51) who successfully detected the respective EF strength combination (d′ ≥ 1).

AC (kV/m)	DC (kV/m)
	1	2	4	8	16
1	1	3	2	14	30
2	4	3	6	29	42
3	9	7	14	29	42
4	11	13	25	35	43