Cognitive Stimulation - The Motivational Chess (MC) was designed to stimulate executive cognitive functioning. The idea of combining Motivational Interviewing (25) with chess game was to stimulate discrepancy, motivation, and support self-efficacy. Volunteers will be submitted to 10 sessions of 90 minutes, over three weeks (total 15 hours: 10 hours of chess practice and 5 hours of motivational interviewing). At the beginning of each session the participants will be divided into pairs and received a sheet containing the game rules (that sheet worked as a kind of working memory aid). During the game practice, there will be a therapist (coordinator) observing, helping, and motivating the participants for goal-directed behaviors. The therapist interventions will be focused on patient's behavior, analyzing if they know the game rules, are able to follow the rules, have visual perception of the pieces, and use strategies considering short or long-term consequences. Another relevant role of the therapist will be empathic with the patients and to help them deal with their own resistance to change or to adapt to new situations.