Identifying the Competencies of ´Visual Literacy´ - a Prerequisite for Knowledge Visualization

Visual representations are becoming more important for teaching, learning and communicating. This paper argues that a more profound understanding of the \´\´vision competencies" constituting \´\´visual literacy" will enable practitioners and researchers alike to produce more effective knowledge visualizations. The main contribution of this paper is to identify some of the core competencies of a visually literate person, by examining the abilities tested in visual intelligence tests