A study of 325 Chicago-area patients with major depression, published today in the Journal of American Medical Association, finds that cognitive behavioral therapy administered via telephone is not only effective, but that significantly fewer participants discontinued therapy compared to those receiving treatment face-to-face (21% vs. 33%). At a 6-month post-treatment follow-up, however, improvement was significantly better among those who received face-to-face treatment. An interview with David Mohr, the principle author, can be heard here.