Fig 1. Behavioral performance on the fMRI working memory task.

(A) Accuracy performance is presented, broken down by condition (control vs. forward), stimulus number (1 vs. 2 letters), and study group. Accuracy was particularly low for participants in the forward condition with two letters. However, accuracy performance did not differ overall between groups. (B) Response times for accurate trials are presented, as in (A). Response times were slowest in the forward condition with two letters. Overall, the PTLD group responded more slowly than did controls, as indicated by the overhead bracket. * indicates condition x stimulus interaction, p < .001; bracket indicates overall group difference, p = .037. Error bars denote one standard error.