We present Vote-O-Graph, an experimental touchscreen voting system designed to simulate reported interface issues in existing electronic voting systems. Touchscreen miscalibration and the application of relative touch coordinates in anonymitypreserving user interface event logs are discussed. Keywords Electronic voting, touchscreens, miscalibration, event logs ACM Classification Keywords H.5.2 User Interfaces: Input devices and strategies General Terms Human Factors, Security 							
						
							
					 															
					Andrea L. Mascher, Paul T. Cotton, Douglas W. Jone