How Tall Is That Bar Chart?

This paper looks at a fundamental issue with how data visualizations are perceived in a VR environment.

Abstract

How Tall is that Bar Chart? Virtual Reality, Distance Compression and Visualizations

Diane Watson, George Fitzmaurice, Justin Matejka

Graphics Interface Conference 2021

As VR technology becomes more available, VR applications will be increasing used to present information visualizations. While data visualization in VR is an interesting topic, there remain questions about how effective or accurate such visualization can be. One known phenomenon with VR environments is that people tend to unconsciously compress or underestimate distances. However, it is unknown if or how this effect will alter the perception of data visualizations in VR. To this end, we replicate portions of Cleveland and McGill’s foundational perceptual visualization studies, in VR. Through a series of three studies we find that distance compression does negatively affect estimations of actual lengths (heights of bars), but does not appear to impact relative comparisons. Additionally, by replicating the position-angle experiments, we find that (as with traditional 2D visualizations) people are better at relative length evaluations than relative angles. Finally, by looking at these open questions, we develop a series of best practices for performing data visualization in a VR environment.