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Name: Benjamin Mako Hill
Member since: 2005-06-16 06:25:53
Last Login: 2012-05-17 21:23:02

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Kuchisake-onna Decision Tree

Mika recently brought up the Japanese modern legend of Kuchisake-onna (口裂け女). For background, I turned to the English Wikipedia article on Kuchisake-onna which had the following to say about the figure (the description matches Mika’s memory):

According to the legend, children walking alone at night may encounter a woman wearing a surgical mask, which is not an unusual sight in Japan as people wear them to protect others from their colds or sickness.

The woman will stop the child and ask, “Am I pretty?” If the child answers no, the child is killed with a pair of scissors which the woman carries. If the child answers yes, the woman pulls away the mask, revealing that her mouth is slit from ear to ear, and asks “How about now?” If the child answers no, he/she will be cut in half. If the child answers yes, then she will slit his/her mouth like hers. It is impossible to run away from her, as she will simply reappear in front of the victim.

To help anyone who is not only frightened, but also confused, Mika and I made the following decision tree of possible conversations with Kuchisake-onna and their universally unfortunate outcomes.

Decision tree of conversations with Kuchisake-onna.
Decision tree of conversations with Kuchisake-onna.

Of course, we uploaded the SVG source for the diagram to Wikimedia Commons and used the diagram to illustrate the Wikipedia article.

Syndicated 2015-02-10 07:09:22 (Updated 2015-02-10 07:13:42) from copyrighteous

30 Dec 2014 (updated 10 Feb 2015 at 19:04 UTC) »

Consider the Redirect

In wikis, redirects are special pages that silently take readers from the page they are visiting to another page. Although their presence is noted in tiny gray text (see the image below) most people use them all the time and never know they exist. Redirects exist to make linking between pages easier, they populate Wikipedia’s search autocomplete list, and are generally helpful in organizing information. In the English Wikipedia, redirects make up more than half of all article pages.

seattle_redirectOver the years, I’ve spent some time contributing to to Redirects for Discussion (RfD). I think of RfD as like an ultra-low stakes version of Articles for Deletion where Wikipedians decide whether to delete or keep articles. If a redirect is deleted, viewers are taken to a search results page and almost nobody notices. That said, because redirects are almost never viewed directly, almost nobody notices if a redirect is kept either!

I’ve told people that if they want to understand the soul of a Wikipedian, they should spend time participating in RfD. When you understand why arguing about and working hard to come to consensus solutions for how Wikipedia should handle individual redirects is an enjoyable way to spend your spare time — where any outcome is invisible — you understand what it means to be a Wikipedian.

That said, wiki researchers rarely take redirects into account. For years, I’ve suspected that accounting for redirects was important for Wikipedia research and that several classes of findings were noisy or misleading because most people haven’t done so. As a result, I worked with my colleague Aaron Shaw at Northwestern earlier this year to build a longitudinal dataset of redirects that can capture the dynamic nature of redirects. Our work was published as a short paper at OpenSym several months ago.

It turns out, taking redirects into account correctly (especially if you are looking at activity over time) is tricky because redirects are stored as normal pages by MediaWiki except that they happen to start with special redirect text. Like other pages, redirects can be updated and changed over time are frequently are. As a result, taking redirects into account for any study that looks at activity over time requires looking at the text of every revision of every page.

Using our dataset, Aaron and I showed that the distribution of edits across pages in English Wikipedia (a relationships that is used in many research projects) looks pretty close to log normal when we remove redirects and very different when you don’t. After all, half of articles are really just redirects and, and because they are just redirects, these “articles” are almost never edited.

edits_over_pagesAnother puzzling finding that’s been reported in a few places — and that I repeated myself several times — is that edits and views are surprisingly uncorrelated. I’ll write more about this later but the short version is that we found that a big chunk of this can, in fact, be explained by considering redirects.

We’ve published our code and data and the article itself is online because we paid the ACM’s open access fee to ransom the article.

Syndicated 2014-12-30 03:05:38 (Updated 2015-02-10 18:32:35) from copyrighteous

My Government Portrait

A friend recently commented on my rather unusual portrait on my (out of date) page on the Berkman website.  Here’s the story.

I joined Berkman as a fellow with a fantastic class of fellows that included, among many other incredibly accomplished people, Vivek Kundra: first Chief Information Officer of the United States. At Berkman, all the fellows are all asked for photos and Vivek apparently sent in his official government portrait.

You are probably familiar with the genre. In the US at least, official government portraits are mostly pictures of men in dark suits, light shirts, and red or blue ties with flags draped blurrily in the background.

Not unaware of the fact that Vivek sat right below me on the alphabetically sorted Berkman fellows page, a small group that included Paul Tagliamonte —  very familiar with the genre from his work with government photos in Open States — decided to create a government portrait of me using the only flag we had on hand late one night.

fellows_list_subsetThe result — shown in the screenshot above and in the WayBack Machine — was almost entirely unnoticed (at least to my knowledge) but was hopefully appreciated by those who did see it.

Syndicated 2014-12-27 23:01:56 (Updated 2014-12-27 23:08:43) from copyrighteous

Images of Japan

Going through some photos, I was able to revisit some of the more memorable moments of my trip to Japan earlier this year.

For example, the time I visited Genkai Quasi National Park a beautiful spot in Fukuoka that had a strong resemblance to, but may not actually have been, a national park.

Genkai Quasi National Park

There was the time that I saw a “Saw a curry fault bread.”

Saw a Curry Fault Bread

And a shrine one could pray at in a barcalounger.

Shrine Comfortable Chair

There was the also the fact that we had record snowfall while in Tokyo which left the cities drainage system in a rather unhappy state.

Japan Unhappy Drain

Syndicated 2014-12-24 01:05:35 (Updated 2014-12-24 01:11:44) from copyrighteous

19 Oct 2014 (updated 10 Feb 2015 at 19:04 UTC) »

Another Round of Community Data Science Workshops in Seattle

Pictures from the CDSW sessions in Spring 2014
Pictures from the CDSW sessions in Spring 2014

I am helping coordinate three and a half day-long workshops in November for anyone interested in learning how to use programming and data science tools to ask and answer questions about online communities like Wikipedia, free and open source software, Twitter, civic media, etc. This will be a new and improved version of the workshops run successfully earlier this year.

The workshops are for people with no previous programming experience and will be free of charge and open to anyone.

Our goal is that, after the three workshops, participants will be able to use data to produce numbers, hypothesis tests, tables, and graphical visualizations to answer questions like:

  • Are new contributors to an article in Wikipedia sticking around longer or contributing more than people who joined last year?
  • Who are the most active or influential users of a particular Twitter hashtag?
  • Are people who participated in a Wikipedia outreach event staying involved? How do they compare to people that joined the project outside of the event?

If you are interested in participating, fill out our registration form here before October 30th. We were heavily oversubscribed last time so registering may help.

If you already know how to program in Python, it would be really awesome if you would volunteer as a mentor! Being a mentor will involve working with participants and talking them through the challenges they encounter in programming. No special preparation is required. If you’re interested, send me an email.

Syndicated 2014-10-19 01:19:52 (Updated 2015-02-10 18:33:09) from copyrighteous

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