PDGA Player Rating available for Leagues
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January 6th, 2012, 07:45 AM
February 27th, 2009
If we know both leagues were played on the same night, we would combine scores from both to do the official ratings so everyone did get the same rating for the same score. Whether the SSAs for each group would come out the same if done separately has more to do with the number of propagators in each group and normal statistical variance than the average rating of either league. In other words, it's 50/50 whether the SSA of one group would be higher or lower than the other group on any given night.
We cannot calculate ratings properly on a league night if fewer than 5 players with established ratings complete rounds where everyone has shot no worse than 70 points below their rating.
The league SSA data will be added to the tournament course data for the course or may be the first SSA data produced for the course in some cases. It will be used for producing ratings in the PDGA smartphone apps. The question for many is whether the SSA during league will be 2-3 shots lower than tournament days. We'll be evaluating what happens once we get a lot more league SSA data to see if this actually happens.
One would think players play better in leagues on their home course. But I'm not sure we've seen that happen with the limited data we've looked at over the years. So this will be an interesting referendum on the stability of SSA values for courses under similar weather but different competitive conditions and player course knowledge.
An interesting fact related to this: one would think players would shoot the same course layout a little better on average in the afternoon than the morning at a tournament based on what they learned in the morning round. However, it doesn't happen. Our data indicates that there's no statistical improvement in the afternoon when the same player pool plays the same layout under similar weather conditions. That's what leads me to believe that league SSAs may not turn out to be much lower than tournament SSAs.
I think players may remember more of their hot rounds on the course since they play it more often especially casual rounds. But the reality may be that most players don't average any better in competition on their home course than other courses they've played only a few times. We'll see what happens.
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