Whether you’re talking or just listening, using a cell phone may make it harder to drive a car safely.

        A new study showed that drivers who were speaking or listening had more difficulty maintaining a steady speed, keeping a constant distance between themselves and other vehicles, and staying in the proper lane.

        Researchers found out that speaking and listening had very similar detrimental effects. The results challenge the widespread presumption that reaction is harder than comprehension and the expectation that talking while driving is necessarily more disruptive than listening.

        Researchers say the results show that the mental task of conversing on a cell phone in addition to the physical task of handling the equipment both impair a person’s ability to drive safely.

        In the study, researchers tested college students skill while driving virtual cars and performing various tasks that required either talking or listening to a speaker in the car while driving, similar to using a hands-free cell phone while driving. For example, while driving the students had to provide answers about the location of various building on their campus or verify statements made by other about the relative positions of buildings on campus.

        The results showed that both speaking and listening had negative effects on driving. Drivers had a harder time maintaining a constant speed or distance between themselves and other traffic than when they were only driving.

        Interestingly, researchers found that when they were speaking they had better lane control although their speed control was worse. Researchers say that before this study, it had been expected that speaking would be more detrimental than listening because speaking is often thought to be a more challenging task.