Figure 1.

The grand-averaged ERPs for the GAD group and the control group.

Notes: Time 0 represents the onset of S2. (A) Controls: the grand-averaged ERPs for the four conditions. While the N270 was not observed in the match condition, it was recorded in the other three mismatch conditions. (B) Patients with GAD: in task-relevant mismatch condition, there was a smaller N270 amplitude at electrode F3 compared to the controls. In the conjunction mismatches condition, there was a smaller N270 amplitude at electrodes F3 and C3 compared to the controls.

Abbreviations: ERPs, event-related potentials; GAD, generalized anxiety disorder.