Index
Ratings
Features
General Info
About the AQB ratings system
This page provides general information about the AQB ratings system and the ratings function. For more specific information you could also consult the following pages:
Formulae: provides more specific information about calculation of the ratings.
Databases: provides information about data collection and development of the results databases.
History: provides information about the history and development of the AQB ratings.
Predictions: provides information about using the AQB ratings to form predictions (expectancies).
Issues: provides information about known issues with the AQB ratings, including the 'conference effect'.
The AQB (Active, Quality-Based) Rating System uses historical data to assign relative performance ratings to each team in the chosen sport. The base for the rating system is the first game in that sport, and ratings begin from that date. Ratings are recalculated after every game using the ratings function, and the new ratings are used for that teams next game.
The ratings function is a linear function represented as follows:
The home-advantage-adjusted ratings differential is the difference between the rating of the winning team and the rating of the losing team, adjusted for home advantage. The ratings change is the increase [decrease] in the winning [losing] team's rating.
This means that if the winning team's home-advantage-adjusted rating is 320 or more greater than the losing team, the two teams' ratings will not change; if the ratings are equal the winning team's rating will increase by 20 (and the losing team's rating will decrease by 20).
These pages and the AQB Ratings System are copyright Michael Cameron. All Rights Reserved. The ratings may be reproduced without permission provided they are stated as AQB Ratings and a reference to this website is made. Any enquiries may be made by e-mail to
