Best Paper Award

Jurassic Mark: Inattentional Blindness for a Datasaurus Reveals that Visualizations are Explored, not Seen

Tal Boger, Steven Most, Steven Franconeri

View presentation: 2021-10-26T16:00:00Z GMT-0600 Change your timezone on the schedule page
Exemplar figure, described by caption below
We often feel like we extract patterns in data from visualizations in an instant. But, perceptual psychology literature shows that extracting such patterns can require a series of filtering operations over time, where we attend to some subsets information, and inhibit others. We demonstrate the presence of this powerful filter when viewing data visualizations; 93% of viewers can miss a conspicuous dinosaur in an inhibited set of dots within a scatterplot. Therefore, data visualizations are not instantly seen, but rather actively explored over time.

Charts, Diagrams, and Plots, Communication/Presentation, Storytelling, Perception & Cognition


Graphs effectively communicate data because they capitalize on the visual system’s ability to rapidly extract patterns. Yet, this pattern extraction does not occur in a single glance. Instead, research on visual attention suggests that the visual system iteratively applies a sequence of filtering operations on an image, extracting patterns from subsets of visual information over time, and selectively inhibiting other information at each of these moments. To demonstrate that this powerful series of filtering operations also occurs during the perception of visualized data, we designed a task where participants made judgments from one class of marks on a scatterplot, presumably incentivizing them to relatively ignore other classes of marks. Participants consistently missed a conspicuous dinosaur in the ignored collection of marks (93% for a 1s presentation, and 61% for 2.5s), but not in a control condition where the judgment task was removed (25% for a 1s presentation, and 11% for 2.5s), suggesting that data visualizations are not "seen" in a single glance, and instead require an active process of exploration.