Check out this snippet from Family Circle magazine (January, 2009, Liz Plosser):

Motorists who talk on a cell phone while driving are 9% slower to hit the brakes, 19% slower to resume normal speed after braking and four times more likely to crash.

Interesting, eh? Need more information? Sorry, that's all the information this article provided. So, what can we conclude? How reliable are these results? Can you believe what the author tells you? Why or why not?