AIM 3: To determine the short and long term effects of GOALS training on measures of emotional regulation, and on plasticity of frontolimbic networks related to emotion processing, in mTBI In a randomized, controlled interventional study design, 36 Veterans with a history of chronic (> 6 month) mTBI and residual cognitive difficulties will be randomized to participate in 5 weeks of cognitive training (GOALS) or a treatment as usual (TAU) comparison. At baseline, week 5 (post GOALS), and at 6 months, participants will undergo a multi-level assessment battery consisting of: 1) neuroimaging with high field (3T) and ultra-high field (7T) structural MR imaging, diffusion tensor imaging (DTI) and resting state fMRI; 2) neuropsychological assessment focusing on complex attention and executive function; 3) complex 'real life' functional task performance; and 4) self-report measures of daily functioning and emotional regulation/heath.