Do you suffer from nomophobia?Nomophobia is the fear of being without your smartphone -- and a newstudyfound that 90% of college students have this fear. Researchers found that nomophobia is also linked to unhealthy sleep habits. “We found that college students who experience more ‘nomophobia’ were also more likely to experience sleepiness and poorer sleep hygiene such as long naps and inconsistent bed and wake times,” said lead author Dr. Jennifer Peszka of Hendrix College in Arkansas.