During a study conducted at Leuven University, Belgium, 2,500 youngsters, aged 13 to 16, were asked how often they were awakened by incoming text messages on their cellular phones and how tired they felt at various times.
Dalam suatu penelitian di Leuven University, Belgia, 2.500 remaja, berusia 13 hingga 16 tahun, ditanya berapa kali mereka terbangun oleh SMS yang masuk ke ponsel mereka dan seberapa capek mereka pada waktu - waktu tertentu.