Measuring the Effects of Chart Embellishments to Better Understand our Perception of Charts

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Skau, D. (2016). Measuring the Effects of Chart Embellishments to Better Understand our Perception of Charts. Unc Charlotte Electronic Theses And Dissertations.
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Abstract

News organizations, non-profits, and even government agencies use information graphics to advertise and communicate their messages. Data visualizations are used heavily in these graphics, but they also often incorporate unusual design elements to help catch viewers’ eyes. In the struggle to rise to the top of the crowd, the data visualizations in infographics are often embellished with additions and modifications to the raw chart. The general consensus is that these embellishments can make charts less effective at communicating information, but most of them have never been tested to see if this is true. This work examines the factors in bar, pie, and donut charts that affect our perception of the charts.I approach this in two different ways, both using a series of surveys on Mechanical Turk. The work on pie charts examines the individual contribution of arc-length, angle, and area variables so that embellishments embellishments may be evaluated based on their use of visual variables. The bar chart work examines some of the most common embellishments designers make to bar charts. This approach allows the isolated study of embellishments to determine which hinder or contribute the most to our perception of charts. I conclude with concrete recommendations based on the findings of the studies. My results show that conventional wisdom about how these charts are perceived is not always correct, and some types of embellishments are harmful while others have virtually no effect.

Details
Author

Skau, Drew

Title

Measuring the Effects of Chart Embellishments to Better Understand our Perception of Charts

Physical Description

1 online resource (100 pages) : PDF

Date

2016

Degree Granting Institution

University of North Carolina at Charlotte

Abstract

News organizations, non-profits, and even government agencies use information graphics to advertise and communicate their messages. Data visualizations are used heavily in these graphics, but they also often incorporate unusual design elements to help catch viewers’ eyes. In the struggle to rise to the top of the crowd, the data visualizations in infographics are often embellished with additions and modifications to the raw chart. The general consensus is that these embellishments can make charts less effective at communicating information, but most of them have never been tested to see if this is true. This work examines the factors in bar, pie, and donut charts that affect our perception of the charts.I approach this in two different ways, both using a series of surveys on Mechanical Turk. The work on pie charts examines the individual contribution of arc-length, angle, and area variables so that embellishments embellishments may be evaluated based on their use of visual variables. The bar chart work examines some of the most common embellishments designers make to bar charts. This approach allows the isolated study of embellishments to determine which hinder or contribute the most to our perception of charts. I conclude with concrete recommendations based on the findings of the studies. My results show that conventional wisdom about how these charts are perceived is not always correct, and some types of embellishments are harmful while others have virtually no effect.

Genre

doctoral dissertations

Subjects--Topics

Computer science
Cognitive psychology

Degree

Ph.D.

Keywords

Bar Chart
Charts
Data Visualization
Donut Chart
Perception
Pie Chart

Subject Area

Computer Science

Advisor(s)

Kosara, Robert

Committee Members

Latulipe, Celine
Dou, Wenwen
Wartell, Zachary
Beorkrem, Christopher

Degree Note

Thesis (Ph.D.)--University of North Carolina at Charlotte, 2016.

Rights Statement

This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). For additional information, see http://rightsstatements.org/page/InC/1.0/.

Rights Holder Information

Copyright is held by the author unless otherwise indicated.

Identifier

Skau_uncc_0694D_11257

Permalink

http://hdl.handle.net/20.500.13093/etd:560