In effect this criterion emphasizes that concepts and conceptual models should have some degree of abstract, logical self-consistency or coherence with other concepts and conceptual models in the discipline. The scientist constructs theories, theoretical concepts or theoretical frames of reference that are isomorphic with the world of observable phenomena. In addition to being intersubjectively certifiable, this related criterion provides that investigators using different research methodologies must be able to test the veracity of the concept or conceptual model and predict the occurrence of the same phenomenon. Davis and associates demonstrated a linkage between perceived usefulness and perceived ease of use, and user's attitudes, intentions and actual computer adoption behavior. In conclusion, it must be reiterated that having a unifying basis for validating IS concepts and encouraging concept creation is potentially the only way of achieving a stream of thought that is coherent and consistent, and which truly follows the scientific method.
Additional references are available upon request from author.