Table 1.
Detailed group characteristics of the obsessive-compulsive disorder group and the control group.
Table 2.
Example of stimuli assignment.
Table 3.
Description of experimental categories.
Table 4.
Overview of Performance measure (LM effects).
Figure 1.
Response-locked potentials for OCD- and control-group.
Response-locked ERPs (negativity is plotted up and each hash mark represents 100 ms of activity in this and in the following figures) of OCD patients (upper panel, N = 16) and control group (lower panel, N = 16). Hits related to both learning conditions and errorful false alarms result in an increased negativity compared to misses and both correct rejections. For the errorless mode (left panel) this is enhanced for OCD as compared to control group. For the errorful condition the opposite is true (most prominent at Fz).
Figure 2.
Topographical distributions of the brain potentials.
Spline-interpolated isovoltage maps at 60 ms reveal a fronto-central distribution of the brain potentials. Darkest color is most negative.
Figure 3.
Bar graphs of mean ERP amplitudes at electrode sites Fz and Cz (0–100 ms after response) for the control groups (left) and OCD group (right).
Figure 4.
Difference waves of false alarms and correct rejections.
Response-locked ERPs of false alarms in comparison to new correct rejection for the control (left panel) and OCD group (right panel). The grey line shows the difference wave of false alarm minus new correct rejections. The corresponding spline-interpolated isovoltage maps of the difference wave shows a fronto-central distribution for the control group. This effect is nearly absent for the OCD group.
Figure 5.
Error-likelihood effects of OCD and control participants. Bar graphs of the mean amplitude difference of correct Yes responses (hits) and No responses (correct rejections) at electrode sites Fz and Cz (0–100 ms) for EL-learning (reduced conflict) and EF-learning (high conflict).