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What rhymes with REDACTION?

At times, it is important to step in and protect the identity of someone sharing an experience in an Active Sensemaking collection to help keep anonymity. We ask people not to share identifiable details about themselves or the people they write about. Some projects center around sensitive or volatile subjects where identifying people or placesContinue reading “What rhymes with REDACTION?”

Fiddling with data

I am always looking for new data visualizations that help stakeholders see something they might not understand with numbers or words. We can take the results from a Slider question and present it in its histogram format and most people will be able to interpret the responses overall. We can tell that the vast majorityContinue reading “Fiddling with data”

Statistics in the Triad, Part VIIIb: Binning, or Where the Data Are actually Concentrated

The first section, ‘Data distribution in a triad’, of Part VIIIa listed some of the quantitative methods for comparison of story data in triads, including confidence regions, point-counting of clusters, and smooth contouring. The last of these uses kernel density estimation (KDE) to calculate a probability density function (PDF) for the data. This statistical alphabetContinue reading “Statistics in the Triad, Part VIIIb: Binning, or Where the Data Are actually Concentrated”

Statistics in the Triad, Part VIIIa: Smoothing, or Where the Data Are not Concentrated

This post is a cautionary tale — a warning buoy, if you will — about a widely-used method to aggregate and smooth data. The caution applies only to SenseMaker projects, which use ternary plots (triads) for both data collection and display, in particular those projects which yield high concentrations of data points near vertices. ForContinue reading “Statistics in the Triad, Part VIIIa: Smoothing, or Where the Data Are not Concentrated”

Statistics in the Triad, Part VII: Mapping The Datasaurus Dozen

Note: If you landed here by searching on “datasaurus” (± “dozen”) and have no idea what SenseMaker is, you can jump to the graphical results. In an earlier post in this series, Part III: Random Data, I showed an example of a SenseMaker triad, with data clustered near vertices, along edges, and in the center;Continue reading “Statistics in the Triad, Part VII: Mapping The Datasaurus Dozen”

Statistics in the Triad, Part V: Closure and Causal Structure

Here’s one of those articles that I carry around, bound to me by neural Velcro, stored in Instapaper, and gestating in background mode:  When Correlation Is Not Causation, But Something Much More Screwy.  It’s a 2012 guest piece in The Atlantic by UCLA sociology professor Gabriel Rossman, merging two 2010 posts from his blog, CodeContinue reading “Statistics in the Triad, Part V: Closure and Causal Structure”

Statistics in the Triad, Part IV: Confidence Regions

When we compare two (or more) groups of data on almost any kind of graphical presentation — histogram, box plot, x-y grid, time series, rose diagram, whatever — a near-universal question arises:  Are the groups significantly different?  The familiar answer is given by error bars or confidence intervals in x-y plots or bar charts, assuming an appropriate statistical model, for exampleContinue reading “Statistics in the Triad, Part IV: Confidence Regions”

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