In the past few years, smartphones have been labeled as the key culprit behind scores of mental and physical ailments, from loneliness to boredom to addiction. But such conclusions are not warranted if we do not examine what exactly people are doing on their phones. According to a study conducted by Nastasia Griffioen of Radboud University, there are major differences in what young adults do on their phones, their motivations for these activities, and the sentiments these activities evoke. The research was recently published in Nature's Humanities and Social Sciences Communications.