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Table 6 Comparison of the N400, LPC, and anterior negativity mean amplitude in the H-SLI and TD groups

From: Atypical audiovisual word processing in school-age children with a history of specific language impairment: an event-related potential study

ERP component Degrees of freedom F p η p 2 Direction
N400
 Group 1,36 1.863 0.181   
 Congruency 1,36 23.356 <0.001 0.393 incon > con
 Group × congruency 1,36 4.635 0.038 0.114  
  Group in congruent 1,36 <1    
   Group in incongruent 1,36 4.517 0.04 0.111 TD > H-SLI
Anterior to posterior distribution 1,36 36.229 <0.001 0.502 CP,P > PO,O
LPC
 Group 1,36 <1    
 Congruency 1,36 54.172 <0.001 0.601 con > incon
 Group × congruency 1,36 <1    
 Anterior to posterior distribution 1,36 3.742 0.061 0.094 PO, O > CP, P
Anterior negativity
 Group 1,36 4.43 0.042 0.11 H-SLI > TD
 Congruency 1,36 3.236 0.08 0.082  
 Group × congruency 1,36 <1    
 Group × anterior to posterior distribution × site 1,36 3.837 0.058 0.096  
   FP sites 1,36 5.913 0.02 0.141 H-SLI > TD
   AF sites 1,36 6.803 0.013 0.159 H-SLI > TD
  F sites 1,36 3.358 0.075 0.085 H-SLI > TD
  FC sites 1,36 1.417 0.242   
 Congruency × anterior to posterior distribution 1,36 16.167 <0.001 0.31  
   F and FC sites 1,37 7.276 0.01 0.164 incon > con
  FP and AF sites 1,37 <1    
  1. Significant results are shown in italics. AF anterior frontal, CP centro-parietal, F frontal, FC fronto-central, FP frontal polar, P parietal, PO parietal-occipital, O occipital; con congruent trials, incon incongruent trials