FIGURE 2.

The total study lasted 7 weeks and comprised an initial visit for a structured clinical interview. After 1 week, participants returned for a Baseline assessment day that included neurocognitive testing (including a fear conditioning and extinction protocol). Participants were then randomly assigned to either the Blue Light Treatment (BLT) or placebo Amber Light Treatment (ALT). During treatment, participants used a lightbox (blue or amber) each morning for 30 min over the 6-week period. Participants returned to complete the same assessment battery at the end of the study as well as a 3T fMRI scan while engaging in a novel context extinction recall task.