User studies offer a scientifically sound method to measure a visualization's performance. A good starting point in any study is the scientific visual design question to be examined. This drives the process of experimental design. A well-conducted study is usually worth the effort. The results can ultimately have a considerable impact and potentially contribute to the discipline's scientific foundations.
Bibliographical noteFunding Information:
We completed this work in part as a component of the basic research on visualization (http://www.VRVis.at/ vis/) at the VRVis Research Center in Vienna, which is funded by the Austrian research program Kplus. The US National Science Foundation also supported our work (ACI-0083421, CCR-0086065, CCR-0093238).