@article {1176163, title = {An Insight-Based Longitudinal Study of Visual Analytics}, journal = {IEEE Transactions on Visualization and Computer Graphics}, volume = {12}, number = {6}, year = {2006}, pages = {1511{\textendash}1522}, publisher = {IEEE Educational Activities Department}, address = {Piscataway, NJ, USA}, keywords = {Evaluation, GUI, information visualization}, issn = {1077-2626}, doi = {http://dx.doi.org/10.1109/TVCG.2006.85}, author = {Saraiya, Purvi and North, Chris and Lam, Vy and Duca, Karen} }