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Table 2 Statistical analysis of the N400 effect

From: Semantic, syntactic, and phonological processing of written words in adult developmental dyslexic readers: an event-related brain potential study

  RJT SJT GJT
Electrode(s) controls dyslexics controls dyslexics controls Dyslexics
Midline 50.01 44.03 26.21 11.74 18.15 7.59
  p < .00001 p = .0001 p = .0005 P = .0065 p = .0017 p = .0203
parasagittal 32.54 27.39 20.93 9.02 29.79 10.2
  p = .0002 p = .0004 p = .001 P = .0133 p = .0003 p = .0096
temporal 13.76 5.04 7.69 5.02 21.88 11.86
  p = .0040 p = .0487 p = .0197 P = .049 p = .0009 p = .0063
C4 55.04 48.99 29.02 8.91 21.34 14.06
  p < .00001 p = .0002 p = .0003 p = .0137 p = .001 p = .0038
  6.16 μV vs. 2.25 μV 3.12 μV vs. 0.14 μV 3.32 μV vs. -1.25 μV 2.86 μV vs. -2.22 μV 5.64 μV vs. 2.99 μV 3.29 μV vs. 1.46 μV
  1. Statistical evaluation of the N400 (RJT, SJT) and the anterior negativity (GJT). The F(1,10)- and p-values for the main effect of WORD TYPE (congruent vs. incongruent) are shown for the different electrode clusters used (see text). As a further illustration, the results for the single electrode C4 are also shown. Note that in all analyses except for the midline electrodes, the WORD TYPE by ELECTRODE interactions were significant (all p < .05). Mean amplitudes in the following time-windows were used: RJT: 250 – 600 ms; SJT: 250 – 600 ms; GJT: 450 – 700 ms.