home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky comp.ai:4681 sci.math.stat:2662
- Newsgroups: comp.ai,sci.math.stat
- Path: sparky!uunet!wupost!cs.uiuc.edu!news
- From: bharat@cs.uiuc.edu (R. Bharat Rao)
- Subject: Re: Learning from subjective data
- Message-ID: <Bzo3Fr.7Kw@cs.uiuc.edu>
- Sender: news@cs.uiuc.edu
- Reply-To: bharat@cs.uiuc.edu
- Organization: University of Illinois, Dept. of Comp. Sci., Urbana, IL
- References: <BzE5G3.Hoq@ux1.cso.uiuc.edu> <ALMOND.92Dec21220007@bass.statsci.com>
- Date: Tue, 22 Dec 1992 15:38:14 GMT
- Lines: 46
-
-
- almond@statsci.com (Russell G. Almond) writes:
- >R. Bharat Rao (bharat@cs.uiuc.edu) writes:
- >> I was wondering if anyone knew of any work that has been done on
- >> learning from subjective data. For instance, you may have a data set
- >> of events with a number of independent attribute (x1...xn) and a
- >> single dependent attribute y. However, y is a subjective rating.
-
- >This is generally a messy problem and I don't know that there has ever
- >been a definative answer. I would, however, try the Psych--Stat
- >literature, especially a graduate text intended for Psych majors.
- >They run into this problem very frequently and are have some standard
- >methods for dealing with it. There is probably a local guru in the
- >Psych department who shows all the grad students how to do their
- >statistical analysis, that would be a good person to start with.
-
- Thanks for the pointers. I will do that.
-
- >Generally speaking, the problem with one expert doing the rating is
- >much easier than with many experts doing the rating. At least we have
- >some hope that a single expert is self-consistent; that is not likely
- >to be true with multiple experts. Achieving agreement among experts
- >is a difficult problem.
-
- OK, the case where you have a unique expert for every problem is
- obviously very messy. Does the situation become any simpler if each
- expert does many ratings (again no point is rated by more than one
- expert)? Say, you have 10,000 data points and 500 experts each rate
- 20 random points. Also, for a point you know the expert who rated
- that point. I think this makes the problem somewhat easier.
-
-
-
- > Russell Almond
- >almond@statsci.com almond@stat.washington.edu
-
- Thanks for your help,
-
- bharat
-
-
- --
- R. Bharat Rao E-mail: bharat@cs.uiuc.edu
- AI Group, Beckman Institute for Advanced Science and Technology
- 405 N. Mathews, Urbana, IL 61801 (217)-333-5978 (O), 337-6498(H)
- Electrical & Computer Engineering, University of Illinois, Urbana
-