[Colloquium] TTI-C Colloquium: Ohad Shamir, Hebrew University of Jerusalem

[Julia MacGlashan]

REMINDER

When:              Monday, March 9 @ 2:00pm

Where:             6045 S Kenwood Ave, TTI-C Conference Room #526 (5th
Floor)

Who:                Ohad Shamir (Hebrew University of Jerusalem) 

Title:                 Vox Populi: On Learning from Crowds


With the emergence of large scale search engines and crowd-sourcing
websites, machine learning practitioners increasingly have to cope with
datasets labeled by a large number of teachers. Unlike traditional datasets,
which are usually labeled by a small select group of experts, here no
a-priori knowledge is available on the teachers, and their quality usually
ranges from excellent to downright malicious. Often, there is no control
over the assignment of instances to teachers, and common multi-teacher
techniques can be impossible or very wasteful to imple-ment.  As a result,
these kind of datasets pose new challenges to both the theory and the
practice of machine learning.

In this talk, I'll discuss some novel approaches to improve and learn from
such data, which use the collective "wisdom of the crowd" to mitigate the
effect of low quality and malicious teachers.

Joint work with Ofer Dekel.

Contact:          Shai Shalev-Shwartz, TTI-C		shai at tti-c.org
834-6850



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