Graduate Studies, UNL

 

Dissertations and Doctoral Documents, University of Nebraska-Lincoln, 2023–

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First Advisor

Susan VanderPlas

Degree Name

Doctor of Philosophy (Ph.D.)

Committee Members

Dan Novy, Erin Blankenship, Réka Howard

Department

Statistics

Date of this Version

5-4-2026

Document Type

Dissertation

Citation

A dissertation presented to the faculty of the Graduate College at the University of Nebraska in partial fulfillment of requirements for the degree Doctor of Philosophy

Major: Statistics

Under the supervision of Professor Susan VanderPlas

Lincoln, Nebraska, May 2026

Comments

Copyright 2026, Tyler Wiederich. Used by permission

Abstract

Data visualizations are powerful tools for communicating complex data structures. They are typically presented in 2-dimensional formats, such as on paper or computer screens. In recent years, technological advancements have enabled traditional data visualizations to be fully rendered in physical environments through 3D printing, offering more natural interactions. However, this style of graphical rendering remains largely unexplored in empirical evaluations with traditional charts. In this research, we conducted two experiments to assess ratio estimations across 2D and 3D charts in digital and physical environments. The first study partially replicated Cleveland and McGill’s (1984) work in perceptual tasks and expanded to incorporate 2D, digitally interactive 3D, and 3D-printed bar charts. For each chart, participants were asked to identify which of the two marked bars was smaller and to estimate the ratio of the smaller bar to the larger. Our results did not suggest that accuracy in ratio estimation differed across chart types. The second study evaluated 2D and 3D heat maps using a similar design, where the third dimension meaningfully communicated a variable within a dataset. In this study, we used 2D, digitally interactive 3D, and 3D-printed heat maps. Participants completed the same comparison and estimation tasks. Our results suggested that 3D heat maps provide more accurate ratio estimations than 2D heat maps, although no differences were detected in accuracy between the digital 3D heat maps and physical 3D heat maps. Lastly, we incorporated both studies as experiential learning projects for multiple sections of an introductory statistics course, where students completed a series of reflections from the viewpoints of participants and consumers of scientific knowledge. Collectively, the studies conducted in this research provide some of the first empirical evidence on 3D-printed statistical graphics and their potential role in data communication.

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