Message-ID: <DCC2D5B7-004B-4C15-ABBC-8E5635FDF7E9@virginia.edu>
Date: 2006-12-26T18:56:24Z
From: Michael Kubovy
Subject: Rating competitors
In-Reply-To: <4591669D.4090108@pdf.com>
I would start with elimination-by-aspects models:
?eba
I would read the Tversky 1972 paper (cited on the help page for the
eba() function), which is brilliant.
Jeff Newmiller wrote:
> I am looking for hints on how to estimate ratings for competitors
> in an ongoing pairwise competition using R... my particular area of
> interest being the game of Go, but the idea of identifying ratings
> (on a continuous scale) rather than relative rankings seems easily
> generalized to other competitions so I thought someone might be
> studying something related already.
>
> I presume the rating of a competitor would be best modeled as a random
> variate on the rating scale, and an encounter between two
> competitors would be represented by a binary result. Logistic
> regression
> seems promising, but I am at a loss how to represent the model since
> the pairings are arbitrary and not necessarily repeated often.
_____________________________
Professor Michael Kubovy
University of Virginia
Department of Psychology
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