[This post is a bit too long! On the DRS mailing list there is an ongoing discussion on the role of theories and the practice of design. This is a version of my post in that debate. Be aware that here it is outside the context of the list. By the way, that list is now and then really interesting. You can search for PHD-DESIGN@JISCMAIL.AC.UK] I have with interest read the thread on theory in design. One of the interesting aspects is what constitutes a theory that has the power to influence practice. Some valuable comments have been made on this issue. Another aspect that has been mentioned has to do with the possibility of knowing if a design is an actual result of a theory. I just want to make a few comments on these two issues. First, there is a basic paradox involved when it comes to the idea of theories influencing design. If we accept a very simple definition of design as a process aimed at producing something new, something unexpected, something not already known or existing, then
Interaction Design, HCI, Philosophy of Design, Technology and Society