Advantageous next generation adaptivity through reflection

Adaptivity is one of the key properties of current and future computer systems to make them more easy to operate, more efficient, and better accessible to a wider audience. By extending both the reach and the effectiveness of systems, adaptivity is nowadays a decisive business factor. A system's adaptivity requires a certain knowledge about the human user. The knowledge typically is incomplete and insecure. Reflection goes even further; it is some novel ability. Reflective system are pondering the reliability of hypothetical knowledge and act more sensitively. This contribution introduces reflection into adaptivity.