Researchers at Cardiff university in Wales have come up with an ounce of the parents wondering about the best way of speaking to teenagers to get them to cooperate the study published in the journal developmental psychology said that too controlling tone of voice can bring out the most negative response his on education correspondent John Cochran the research is he's classic family arguments such as trying to get a teenager to do the homework see how much tone of voice made a difference more than a thousand youngsters age fourteen and fifteen was subjected to the same instructions delivered in different ways using the voices of mothers rather than fathers to these defective approach was the controlling voice which is more likely to start an argument than to get teenagers to do what they were told the same words in a supportive voice profoundly much more persuasive the message was stressed out parents seems to be that is not what you say but the way the