Human-Computer Interaction Themes in Digital Government: Web Site Comprehension and Statistics Visualization Ben Shneiderman Deptof Computer Science,Human-Computer Interaction Lab, Institute for Advanced Computer Studies, and Institute for SystemsResearch University of Maryland, College Park, MD 20742 +1 (301) 405-2680 ben@cs.umd.edu ABSTRACT Digital government applications often involve web sites to provide information for citizens and visitors from essential services such as passport applicati