Figures 1 and 2 illustrate log-transformed total alpha power and alpha asymmetry score topographies, respectively, as a function of lifetime MDD status, condition, and channel location. Specifically, Figure 1 demonstrates that across reference modes, alpha power was greatest at posterior sites, replicating prior research (e.g., Debener et al., 2000), and frontal alpha power appeared strongest for the withdrawal condition. In addition, Figure 2 shows that group differences in asymmetry appeared to be more robust for the withdrawal condition than approach and rest conditions across references.
