Statistical Analysis of USDF 2008 Competition Data
Updated Analysis of Dressage Scores
The updated dressage score analysis study performed and complied by Yount, Diaz, and Johnston is available for your information. The analysis is published in two sections: an Executive Summary and the Appendix, which contains the full statistical analyses. It looks at more than 40,000 scores from 425 shows conducted in the March-August 2008 timeframe. It identifies issues that will adversely impact individual riders who may attempt to meet the Performance Standards proposed in DR 119.3 and DR 135.
Statistical Analysis of USDF 2008 Competition Data Summary
Statistical Analysis of USDF 2008 Competition Data APPENDIX
Statistical Analysis of USDF 2007 Competition Data Summary
The key issues are:
· There are insufficient numbers of low scoring rides to justify the economic impact of implementing a rule change that will affect 100% of the riders.
· There are statistically significant differences among the USDF Regions, breeds of horses, and individual judges that are independent of rider skill but which will have impacts on a rider’s ability to meet the Performance Standard criteria. These differences raise a question of equity and the assumption of a level playing field.
· The proposed Rider Qualification Test is an unknown at this time. It will need to be verified and validated as a test instrument before there can be confidence that it accurately assesses a rider’s readiness to advance to 4th level.
· A regression analysis of 3rd level and 4th level scores indicates that the current 3rd Level Test 3 is not a very accurate predictor of 4th Level skills.
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