The goal of this clinical trial is to learn if video game-facilitated group activity helps to improve the quality of life and social function in inpatients with chronic schizophrenia. The main questions it aims to answer are: * Does video game-facilitated group activity enhance the quality of life as measured by a standardized scale (WHOQOL) in patients with schizophrenia hospitalized in a psychiatric hospital? * Can video game-facilitated group activity promote social function as measured by a specific scale (PSP) in patients with schizophrenia hospitalized in a psychiatric hospital? Researchers will compare video game-facilitated group activity to regular occupational therapy to see if the intervention is beneficial to patients with chronic schizophrenia. Participants will: * Attend to video game-facilitated group activity or regular occupational therapy three times a week for 12 weeks. * Receive assessments upon and after the 12-week intervention, and another 12 weeks after the intervention ends.
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The changes of quality of life
Timeframe: The outcome will be assessed at baseline, week 12, and week 24.
The changes of social function.
Timeframe: The outcome will be assessed at baseline, week 12, and week 24