Table 5. Student t-values from planned contrasts testing for the presence of PPI (0 vs. 360-ms SOA) and refractoriness (60- vs. 360-ms SOA) on factor scores and base-to-peak amplitudes for midline ERP components.

 

 

Factor Scoresa

Base-to-Peak Amplitudesb

Component

Lead

PPI

Refractoriness

PPI

Refractoriness

Midline

N19

Fz

Cz

<1

<1

<1

<1

1.01

1.17

<1

<1

P30

Fz

Cz

<1

<1

<1

<1

1.36

<1

1.81

<1

N40

Fz

Cz

2.69*

3.06**

2.08

3.01**

<1

3.77**

<1

3.25**

P50

Fz

Cz

3.06**

6.24**

2.54*

2.15*

2.37*

4.09**

1.98

2.10*

N100 (C3)

Fz

Cz

4.06**

5.63**

<1

2.72**

P200

Fz

Cz

4.95**

11.30**

3.98**

6.47**

Lateral

C1

F8

T4/6

1.21

<1

2.64*

<1

C2

F8

T4/6

3.87**

4.22**

<1

2.29*

*p < .05. **p < .01.

adf=35.

bdf=12 (N19), 22 (P30), 18 (N40), 28 (P50), 35 (N100, P200).