San Francisco
Chapter of the American Statistical Association Seminar
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Speaker: |
William D Heavlin (bheavlin@google.com), Google, Inc. |
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Time: |
February
3rd, 2015 4:30-6:00pm
(4:30-5:00 networking/refreshment; 5:00-6:00 seminar) |
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Location: |
Stanford
University, Room 4205 of Scully Ctr. For Clinical Sciences Research building
(CCSR) |
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Title: |
RANKING PERFORMANCE VIDEOS |
Abstract:
As American Idol attests, where one performance
entertains, two performances compete. In 2011-2012 YouTube presented a few series
of pairs of video performances (ÒslamsÓ), and invited its viewers to vote for
their favorite. The first-order goal is to determine better videos: the
resulting rankings guided YouTube viewing suggestions. A secondary goal is to
entertain the viewers voting: greater participation both increases data volume
and enhances the YouTube brand.
Here we consider three statistical issues: (1)
how to pair and play the videos, the tournament design problem; (2)
how to rank the videos, the (primal) estimation problem; and (3)
how to rank the acuity of the viewers, a (dual) estimation
problem. Our approach likewise has three components: (a) a linearized
objective function to schedule performance pairs, (b) a Bradley-Terry model to
estimate performance quality; and (c) Fisher scores to
assess voter acuity.
Direction
for the location:
Directions to Stanford University can be found at http://visit.stanford.edu/plan/.
The seminar will take place in room 4205 (CCSR4205) of Scully Ctr. For Clinical Sciences Research building (CCSR). Please refer to
the campus map attached below for building location and parking options. Interactive map is available at http://campus-map.stanford.edu/index.cfm?ID=07-920. Parking is free after
4:00pm at Stanford parking lots.