Despite numerous software engineering problems, the software development community as a whole still suffers from delayed and canceled software projects. The basic idea of this paper is that this is – besides other potential reasons – also due to little focus on how people participating in software processes interact. These interactions seem crucial to the success of software processes and in fact they are very often only poorly supported.

In this paper we explain why we believe that interactions require more attention in software process modeling and support, which kinds of typical interactions we have identified, how they can be mapped to findings from the field of psychology and which kind of instruments might be suited to support them.