This study evaluates the effect of a new cognitive remediation program designed for patients suffering from a bipolar disorder, on cognitive functions, psychosocial functioning and neural processes. In this double-blind (patient, outcomes assessor) controlled randomized trial the investigators compare patients receiving the ECo program for bipolar disorders, to patients benefiting from the broadly used cognitive remediation program CRT and to patients receiving supportive psychotherapy. Patients are treated for 3 months and monitored for 9 months.