In studying how taking selfies affect our mood, researchers at the Donald Bren School of Information & Computer Sciences in the US divided 41 college students into three groups. Each group was asked to take one of the following types of photos every day: a smiling selfie, an image that made the person happy, and a snap that participants thought would bring joy to others. Subjects were supposed to report their emotions three times a day, and after four weeks, researchers were pleased to share that members in all the groups ended up being more cheery. The selfie group participants felt more confident and comfortable, and those who took photos of things they liked became more appreciative and reflective. Those who posted things for others also said they felt calmer and more connected to friends and family, which helped to bust stress. The good news, the researchers remind us, is that most of us carry a mobile device these days, making it an easy tool for photo-taking and lifting our spirits any time of the day.