From Science Blog:
Does God or some other type of transcendent entity answer prayer?
The answer, according to a new Arizona State University study published in the March journal Research on Social Work Practice, is “yes.” David R. Hodge, an assistant professor of social work in the College of Human Services at Arizona State University, conducted a comprehensive analysis of 17 major studies on the effects of intercessory prayer – or prayer that is offered for the benefit of another person – among people with psychological or medical problems. He found a positive effect.
“Overall, the meta-analysis indicates that prayer is effective. Is it effective enough to meet the standards of the American Psychological Association’s Division 12 for empirically validated interventions? No. Thus, we should not be treating clients suffering with depression, for example, only with prayer. To treat depression, standard treatments, such as cognitive therapy, should be used as the primary method of treatment.”