Charts, maps, and graphs can be great tools for illuminating trends and patterns in data. But data visualization has its pitfalls and landmines. Sometimes charts, graphs, and maps can have harmful consequences, intended or not. So I’m starting a series of 60-Second Data Tips that point out pitfalls and landmines to avoid. This time it’s about polarization.
When visualizing data, we should consider how humans think including heuristics (i.e. mental shortcuts) and biases. That’s a tall order given how many shortcuts and biases affect our thinking. See Diagram B below. Some of them have particular relevance to data visualization such as conformity bias, which is the tendency to change one's beliefs or behavior to fit in with others. Can data visualization exacerbate this bias?
You are likely familiar with charts showing U.S. attitudes toward public policies which highlight the gap between Democrats and Republicans. Researchers conducted experiments to explore whether such charts invoke viewers’ social-normative conformity bias, influencing them to match the divided opinions shown in the visualization. In three experiments described in Polarizing Political Polls: How Visualization Design Choices Can Shape Public Opinion and Increase Political Polarization, researchers either aggregated data as non-partisan "All US Adults," or partisan "Democrat" / "Republican." (See Diagram A) They found that the partisan charts tended to increase viewers’ polarization while the non-partisan charts did not, leading the researchers to conclude that visualizing partisan divisions can further divide us.
So when showing differences of opinions across various groups, we should take this finding into consideration. Is our ultimate aim to divide or unite?
Diagram A
Source: IEEE Visualization Conference
Diagram B
Source: https://upload.wikimedia.org/wikipedia/commons/c/ce/Cognitive_Bias_Codex_With_Definitions%2C_an_Extension_of_the_work_of_John_Manoogian_by_Brian_Morrissette.jpg
To see past data tips, click HERE.
Let’s talk about YOUR data!
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