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Table 3 Congruency effects in EEG subjects in the reaction time (A) and in the peak latency of the P3b (B). Facilitation (neutral vs. congruent) and interference (neutral vs. incongruent) effects were tested by post-hoc Tukey contrasts from the Congruency ANOVAs. Distance effects in the amplitude of ERPs at electrode P8. Results for time intervals demonstrating significant effects are shown. Distance 5 minus distance 1 (D5-D1) values are given for both tasks, in μV. The F and the p values for the distance effect are given in the two lowest rows. The results of relevant post-hoc tests are given in the text. (Distance × Task df = 1,9.)

From: The speed of magnitude processing and executive functions in controlled and automatic number comparison in children: an electro-encephalography study

  

A. Reaction Time

B. P3b peak latency

  

Grade 3

Grade 5

Adults

Grade 3

Grade 5

Adults

Numerical Task

F

91.50

90.01

57.31

n.s.

n.s.

14.74

F(2,18)

ε

0.626

0.921

0.985

---

---

0.711

Congruency

p

<0.0001

<0.0001

<0.0001

---

---

0.0010

Facilitation

p

0.0002

0.0152

0.0040

---

---

0.0368

Interference

p

0.0001

0.0001

0.0002

---

---

0.0355

Physical Task

F

26.92

30.00

38.44

n.s.

n.s.

16.29

F(2,18)

ε

0.586

0.800

0.592

---

---

0.626

Congruency

p

0.0002

<0.0001

<0.0001

---

---

0.0012

Facilitation

p

0.89

0.98

0.42

---

---

0.88

Interference

p

0.0002

0.0002

0.0002

---

---

0.0006