Researchers from North Carolina State University looked closely at our aging population to see if there was a link between playing video games and mental well-being "happiness." They found that senior citizens who said they played video games — even occasionally — reported "higher levels of happiness, or well-being," says Rick Nauert at PsychCentral. "Those who did not play video games reported more negative emotions" and were more likely to be depressed. It's unclear what exactly is behind this link — or if the relationship is even causal.