Table 2. Summary of effects on the posterior P300 (Pz) and the fronto-central P300 (FCz).

P300 measure	Posterior P300		Fronto-central P300
Effect	F	p	F	p
Valence	25.22	<.001	< 1	n.s.
Magnitude	33.60	<.001	13.30	.001
Valence by magnitude	7.97	.007	9.73	.003
Stress induction	4.53	.039	3.42	.071
Magnitude by stress induction	12.10	.001	5.77	.020

The F(1, 45)- and p-values are reported.