# Table 4 Tests of study hypotheses (one-sided t test, Bonferroni uncorrected) and post hoc follow-up of significant ANOVA effect (two-sided t test, Bonferroni uncorrected)

Hypotheses Reference scheme Group difference, t/p/d Main effect, t/p
ASD vs. UC UC vs. US US vs. ASD ASD UC US UF
1. Face over objects superiority effect (difference between N170 latency for face and houses upright at P8) Nose 1.12/.13/.22 .42/.34/.09 1.56/.06/.34 .91/.18 2.52/< .01 3.52/< .01 1.40/.09
REST 1.43/.08/.28 .72/.23/.16 1.92/.03/.42 1.88/.03 4.64/< .01 4.07/< .01 2.28/.02
Average 2.50/< .01/.49 .88/.19/.19 1.53/.06/.34 1.68/.05 7.10/< .01 4.85/< .01 2.86/< .01
Vertex 1.25/.10/.25 .23/.41/.05 1.05/.15/.23 1.93/.03 4.03/< .01 4.6/< .01 2.03/.03
2. Face inversion effect on P1/N170 slope (difference between face upright and face inverted at P8) Nose .84/.20/.17 .39/.34/.08 .48/.31/.10 4.17/< .01 5.10/< .01 5.99/< .01 .99/.17
REST 1.95/.02/.39 1.22/.12/.26 .68/.25/.10 3.72/< .01 6.07/< .01 4.59/< .01 1.14/.14
Average 1.32/.09/.26 1.44/.08/.31 .06/.47/.01 3.02/< .01 6.92/< .01 4.03/< .01 .53/.30
Vertex 1.46/.07/.29 1.28/.10/.28 .24/.41/.05 3.03/< .01 6.58/< .01 3.89/< .01 .72/.24
3. Post hoc follow-up*: Inversion effect on N170 amplitude (difference between upright and inverted stimuli—face and houses—at P8/P7) Nose .19/.85/.04 .30/.77/.06 .09/.93/.02 2.60/.01 3.62/< .01 2.87/.01 .99/.34
REST 1.64/.10/.32 .44/.66/.09 1.03/.31/.23 3.25/< .01 4.66/< .01 1.23/.22 .28/.78
Average 2.11/.04/.42 1.79/.08/.39 .24/.81/.05 1.99/.05 3.33/< .01 1.42/.16 .61/.55
Vertex 3.11/< .01/.62 1.98/.05/.43 .92/.36/.11 .39/.70 3.79/< .01 1.99/.05 .15/.88
1. Note: *two-sided t test; The results of between group comparisons are italized when the difference is significant, and in bold when the results of comparison survived Bonferroni correction. The t/p/d in the colunm headings corresponds to t-test statistics, p value of significance and d Cohen's effect size