Error Bars Considered Harmful: Exploring Alternate Encodings for Mean and Error.

ABSTRACT: When making an inference or comparison with uncertain, noisy, or incomplete data, measurement error and confidence intervals can be as important for judgment as the actual mean values of different groups. These often misunderstood statistical quantities are frequently represented by bar charts with error bars. This paper investigates drawbacks with this standard encoding, and considers a set of alternatives designed to more effectively communicate the implications of mean and error data to a general audience, drawing from lessons learned from the use of visual statistics in the information visualization community. We present a series of crowd-sourced experiments that confirm that the encoding of mean and error significantly changes how viewers make decisions about uncertain data. Careful c

SUBMITTER: Correll M 

PROVIDER: S-EPMC6214189 | biostudies-literature | 2014 Dec

REPOSITORIES: biostudies-literature