Digital Watch Chris Roe A digital watch model with activity diagram This digital watch model builds on [X] and its mode of operation is slightly different. It represents a real watch and the buttons pressed on the model reflect exactly what should happen on the watch I owned at the time. Alongside the visualisation of the digital and analogue versions is a diagram which aimed to represent a possible mental model I have as I am using the watch. Users are set tasks to achieve such as altering the time to simulate moving into British Summer Time. 2001 1 digitalwatchRoe2001 model PhD tkeden %eden %scout %donald screenshot.gif README digitalwatchFischer1999 paper65 paper66 simulation education