Fig. 7: Mean amplitude of SPN in the simple, moderate, and complex conditions.
From: Feature versus object in interpreting working memory capacity

A In the 2 items condition, the amplitude of moderate condition was significantly higher than that of simple condition, and the amplitude of complex condition was significantly higher than that of moderate condition. B In the 4 items condition, there were no significant differences. C In the 6 items condition, there were no significant differences.