Researchers believe the mobile phone system makes young people less thoughtful and more likely to make mistakes elsewhere in life. Hitting a few keys and then seeing the desired word appear in full trains children to be fast but inaccurate when doing other things, according to Australian scientists. They warn that this could have  _ throughout the country, especially as more than 9 out of 10 16-year-olds now own a mobile phone as well as 40 percent of primary schoolchildren. In a new study, Professor Michael Abramson, a researcher at Monash University, Melbourne, Australia, analyzed the mobile phone use of children aged between 11 and 14 and their ability to carry out a number of computer tests. A quarter of the children made more than 15 voice calls a week and a quarter of them wrote more than 20 text messages a week.  When researchers studied the way in which the children handled IQ-type tests they found that increased mobile phone use appears to change the way their brains work. Prof Abramson said, "The kids who used their phones a lot were faster on some of the tests, but were less accurate. "We suspect that using mobile phones a lot, particularly tools like predictive texts for SMS (Short Message Service), is training them to be fast but inaccurate. "Their brains are still developing, so if there are effects then potentially it could have effects in the future. "The use of mobile phones is changing the way children learn and pushing them to become more impulsive   in the way they behave." Experts concerned about the possible impact of mobile phone radiation on developing brains have given a warning over children's use of them. But Prof Abramson says the amount of radiation given off when texting is a mere 0.03 percent of that given off during voice calls - suggesting radiation is not to blame for the brain effects. Instead, he thinks predictive texting could be doing the damage. The study was published in the journal Bioelectromagnetics and disagreed with previous studies which suggested that text messaging encourages children's language skills and did not damage their ability to spell. Which of the following is the best title for the passage?
Mobile phone use is training children to be fast Children use mobile phones much more than before The negative impacts of mobile phone radiation Text messaging is making children more impulsive