Web-based or on-line experiments are still a relatively new research topic. Laboratory or highly controlled experiments
are, for many reasons, the preferred methodology for visual experiments. However recent experiments suggest that online
experiments have some unique properties and advantages that may in some cases outweigh or offset their
disadvantages. This paper will consider on-line experiments from both a general and a narrow perspective. Specifically a
range of specific experiments, and on-line tools, will be considered from a broad vantage and possible themes or
considerations for these experiments will be considered.