5th Symposium on Conceptual Modelling Education (SCME 2017) Cognitive Effectiveness in Conceptual Modeling Kathrin Figl1 Institute for Information Systems and New Media 1 WU - Vienna University of Economics and Business kathrin.figl@wu.ac.at Abstract. Not even the most brilliant conceptual model would be of any use if no one could understand it. A basic precondition for a models’ usefulness in practice is that it is comprehensible. In this keynote, I will give an overview on the vibrant stream of cognitive research on conceptual modeling and summarize empirical evidence on how to develop useful and understandable (visual) conceptual models. More precisely, I will present a systematic summary of empirical and theoretical work on the sources of cognitive effort in comprehending visual conceptual models. Such insights can be a valuable enhancement to any modeling course! 3