 This study evaluates the effectiveness of Guttmann NeuroPersonalTrainer GNPT, a tele-rehabilitation platform developed as a tool for the cognitive rehabilitation of chronic stroke patients. All patients will receive this treatment but in different order: half will receive GNPT and the other half will receive sham cognitive training; after a washout period of three months, crossover will occur and participants from the GNPT condition will receive sham cognitive training, while participants originally from the control intervention will receive GNPT. 