Table 2 The results of ANOVAs for the amplitudes and latencies of N400 and late positive component (LPC) with respect to the three factors

	For the amplitude(1,15)(5,75)(5,75)					For the latency(1,15)(5,75)(5,75)
	F	ε	P	partial η²	Bonferroni	F	ε	P	partial η²	Bonferroni
N400
stimulus group	5.789	NA	0.029^*	0.278	TS > CS	3.115	NA	0.098	0.172	NA
stimulus type	8.429	NA	0.000^**	0.360	OQ,OW,OWP >OCP; OWP > OC	0.539	NA	0.746	0.035	NA
brain area	2.158	0.438	0.128	0.126	NA	1.431	0.579	0.247	0.087	NA
stimulus group* stimulus type	13.025	0.568	0.000^**	0.465	See Table 3	1.442	NA	0.219	0.088	NA
stimulus group* stimulus type* brain area	3.540	0.228	0.004^*	0.191	See Table 3	1.147	0.351	0.335	0.071	NA
LPC
stimulus group	2.388	NA	0.143	0.137	NA	0.050	NA	0.826	0.003	NA
stimulus type	10.023	NA	0.000^**	0.401	OCP > OQ,OW,OWP	1.791	NA	0.125	0.107	NA
brain area	6.648	0.418	0.004^*	0.307	LT > RD,RM; RT > RM	0.948	NA	0.455	0.059	NA
stimulus group* stimulus type	7.594	NA	0.000^**	0.336	See Table 4	0.702	NA	0.624	0.045	NA

The degrees of freedom corresponding to the three factors and their interaction are indicated within the brackets on the first line. The symbol “>” signifies that the amplitudes on the left side of “>” are significantly larger than those on the right side, while there are no significant differences among the corresponding conditions on the same side of “>”. F represents the F-value from ANOVA, and partial η² is the effect size for the ANOVA. NA indicates that the information is not applicable. LT and RT represent the left and right sides of the telencephalon, LD and RD represent the left and right sides of the diencephalon, and LM and RM represent the left and right sides of the mesencephalon. OC refers to the original advertisement call with six notes; OCP represents the rising intonation version of OC, where the pitch of the sixth note was increased by 15%; OQ indicates modified version of OC, where the sixth note was replaced by the sixth note of an advertisement call from a sympatric anuran species, Quasipaa boulengeri; OQP represents the rising intonation version of OQ, with a 15% increase in the pitch of the sixth component; OW denotes the altered version of OC, with the sixth note replaced by white noise; and OWP represents the rising intonation version of OW, with a 15% pitch increase in the sixth component. In addition, CS and TS refer to the control and treatment stimuli, respectively. *p < 0.05 and **p < 0.001.

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