Table 2

Statistical analysis of the N400 effect

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


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.

Rüsseler et al. BMC Neuroscience 2007 8:52   doi:10.1186/1471-2202-8-52

Open Data