bar-chart-embellishment's Introduction

Bar Chart Embellishment Evaluation

This project was used in a study that used the Mechanical Turk platform to test a series of bar chart embellishments for the paper: Drew Skau, Lane Harrison, Robert Kosara, An Evaluation of the Impact of Visual Embellishments in Bar Charts, Computer Graphics Forum (Proceedings EuroVis), vol. 34, no. 3, pp. 221–230, 2015.

The study is built on the excellent Experimentr.js project.

Both data files showing the resulting data are available in the data directory. This is a summary of the data fields in the Bars Data file, the Demographics are pretty self-explanatory:

Field Name	Description
time_start_time-trial	Unix time for beginning of the question
bars	(For relative questions) Which of the three bars were being asked about
time_end_time-trial	Unix time for ending of the question (if this is missing, it is the same as time_end_trials from the demographics data)
bar	(For absolute questions) Which of the three bars was being asked about
data-trial	The data used for each bar
number-in-series	Position within a given chart type
log-error	Log absolute error as reported in the paper
totalSequence	Position within the entire study for that participant
question-trial	Abbreviated plain english version of the question
judged-true	Judged answer minus true answer
ans-percentage-diff	(given-correct)/correct
max-mid-min	whether the bar in question was the tallest, middle, or shortest
number-in-section	Position within absolute or relative questions
adjacent	(For relative questions) Whether the bar in question was adjacent to the one it was compared to
question-type	Absolute or Relative
ans-trial	Given answer
postID	ID generated by experimentr
chart-embellishment	Embellishment name
time_diff_time-trial	Time in miliseconds that it took to answer the question
correctAns-trial	Correct answer

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