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 | |