Study: E-readers, tablets can disrupt sleep

Science may have confirmed what parents of gadget-loving children have long suspected: Using light-emitting gadgets just before bedtime can interfere with sleep.Using an electronic book reader or another portable electronic light-generating device prior to going to sleep can disrupt regular sleeping habits, researchers at Pennsylvania State University have found.“The take-away is, however unpopular, to avoid use of these devices before bedtime,” said Anne-Marie Chang, an assistant profess