Table 1.

The effect of problem size on the amplitude of the N2 component.

Topographical area	Problem size effect (μV, large minus small)
Prefrontal left	–2.12*
Prefrontal right	–2.12*
Frontal left	–2.38**
Frontal midline	–2.69*
Frontal right	–2.07*
Fronto-central left	–2.62**
Fronto-central right	–1.79*
Central left	–2.33**
Central midline	–
Central right	–

*p < 0.05; **p < 0.01.

Only significant problem size effects are shown.