美国科学60秒 SSS 2013-06-20（在线收听）

 　　this is sss ,i am karry,this will just take a minute.are you listening to the pod cast while you drive then texting your friends about it,huh,don't do that.i mean,because a new studay shows even you are using a handsfree device,sending or receiving a electronic meassages can prove a major distraction as green to research sponrer by the trbile foundation for traffic safety.more and more car makes are equipting their vechiles with gages that allow you to interact with electronics from checking your gps to updating you facebook page.many of these fetures are increasingly voive actived so you can keep your eye on the road and you pods attend too.handsfree is always riskfree.researchers messured drivers' brain activity.as they engaged in common text while behind the wheel,like listening to an audio book,talking on a phone or bounding to a voice activated email system and they feel like calling was chanllenge but the core responding require serious mental band with even withou using fingers.voice recgenization textting slow driver's reaction times and miss things right in front of them and that kind of miss can lead to a heat.thanksfor the minute for sss,i am karry.