Patrick G. T. Healey Nik Swoboda James King An Environment for Conducting and Analysing Graphical Communication Experiments. 103-105 2002 conf/diagrams/2002 Diagrams http://link.springer.de/link/service/series/0558/bibs/2317/23170103.htm db/conf/diagrams/diagrams2002.html#HealeySK02