To examine the incremental benefit of pairing tDCS with cognitive remediation, a 110 clinically stable outpatients between the ages of 18-60 who have a diagnosis of schizophrenia or schizoaffective disorder will be enrolled in a double-blind, double-baseline, sham-controlled clinical trial. Participants will be randomized in a 1:1 ratio to receive either tDCS or sham stimulation concurrent with working memory focused cognitive remediation. Training will be offered to participants in a small group format. Training will consist of 48 sessions, with 2-3 sessions scheduled in a week. Each training session will last 2 hours. One hour will be spent completing cognitive exercises that require working memory skills on a computer. TDCS or sham stimulation will be offered concurrent with the first 20 minutes of training with a StarStim neuromodulator. One mA of anodal stimulation will be applied to the left dorsal lateral prefrontal cortex and the cathodal electrode will be placed in the contralateral supraorbital position. Upon completion of working memory training, participants will transition to a 30-minute discussion group. The discussion will focus on application of cognitive skills in everyday life. Effective strategies for approaching cognitive tasks will be described and practiced. Participant experience with aspects of the training will be monitored with self-report measures of motivation, mood, and physical reactions. To assess intervention-induced change, working memory, other aspects of cognition, functional capacity, and community functioning will be assessed pre- and post-intervention. Cognitive outcomes will be assessed with training tasks as well as tasks that are unfamiliar to participants. A performance-based measure will be used to assess functional capacity for everyday living skills and a self-report instrument will be used to assess community functioning. Potential confounds such as symptom severity, medication changes, outside treatment hours, and significant life stressors will be assessed individually every 2 weeks during the intervention phase of the study. Sustainability of intervention-induced change will be assessed with assessment sessions 6 weeks and 6 months post-intervention. Change in performance during the first 12 training sessions on two working memory training tasks, a n-back task and a complex span task, will be used to determine if early response to treatment is predictive of post-intervention outcomes. An intent-to-treat analysis will be used to analyze intervention-induced change. Regression analyses will be conducted to identify predictors of treatment response.