Figure 2.

Behavioral performance and classifier accuracy during training runs. (A) Mean No Go accuracy on blocks where participants were instructed to ignore the words (i.e., attend to faces), separated by whether the block included trauma or neutral words. (B) The same as (A) except for blocks where participants were instructed to attend to the words. (C) Group differences in support vector machine (SVM) classifier accuracy during training runs in attend-to-word and attend-to-face blocks dependent on the presence of trauma-related words. Results showed significantly poorer classifier accuracy during neutral word blocks for both posttraumatic stress disorder (PTSD) and control groups, but no overall group differences on classifier accuracy. (D) Scatterplot depicting the significant linear relationship between mean SVM cross-validation accuracy and mean no go accuracy, suggesting that better brain state differentiation is related to better attention towards task-relevant stimuli.