Technological developments and applications in clinical psychology and psychotherapy: Summary and outlook.

The current state as described in the articles in this special issue is summarized. Fascinating possibilities exist, and technical applications have a potential for making a contribution back to underlying concepts, but a critical overview also reveals gaps, not only from a scientific perspective. We are warned of a use of "empty technology." An outlook for great possible developments comes with a postulate of keeping the cost-benefit ratio in mind. Copyright 2004 Wiley Periodicals, Inc. J Clin Psychol.