 They found that it wasn't the use of an electronic device that impaired the students attention, because more than twice as many students saw the clown while listening to music, than while on the phone.They concluded that it is using a cellphone, and having to divide attention between the conversation and the surroundings, what makes people less likely to notice the clown.They observed that many of the students using their cells walked slower, changed directions more often and weaved more than other students.