Table 2.

Summary of event-related potentials (ERPs) results.

	white		blue		yellow		Pairwise comparison results
	M (μV)	S.E.	M (μV)	S.E.	M (μV)	S.E.
P1	2.311	0.448	3.493	0.472	2.596	0.416	yellow < blue*, white < blue’
N1	−0.814	0.778	0.132	0.805	−0.734	0.804	yellow > blue’, white > blue*
P2	3.295	0.771	3.400	0.806	4.595	0.947	yellow > blue’, yellow > white*
N2	−2.132	0.972	−0.543	0.790	−0.342	0.858	white > blue*, white > yellow*
P3	3.258	1.356	3.887	1.423	4.798	1.237	yellow > white**

P1, P2, and P3 refer to the first, second, and third positive components after stimulus onset, N1 and N2 refer to the first and second negative components after stimulus onset.

^’p < 0.1;

^*p < 0.05;

^**p < 0.01. The relative magnitudes of an ERPs component in different conditions were determined depending on its polarity.