The correction factor is employed when a team underperforms or overperforms relative to the power rating predictions. The greater the disparity in the actual to predicted difference increases the amount of correction.

A team receives or loses quality points based on the predicted goal difference of a game. If a team wins, it gets quality points. If a team loses, it loses quality points. This is done so that this factor is not unfairly influenced by the number of games a team plays. The table below explains the number of points. Here is how to verify the quality points:

(1) Determine who is the favorite team and who is the underdog. The "Reg In" column on the ratings page lists the power ratings. Note that 'Reg In' counts only games played within a league (teams listed on the same ratings page) and does not count games played outside a league or state. This power rating is NOT the same as the total power rating, because that value includes out-of-league games, the 10-goal adjustment, the win-loss component, as well as the correction factor. Also note that although a team might have a total power rating greater than an opponent, its 'Reg In' value could be less than that of the opponent.

(2) Determine the predicted goal difference. This value can be found on each team's page and is listed under Table 2 'Goal Differential' in the 'Predicted' column.

(3) Next use the table below to find the correction factor.

Example: Apex defeats East Chapel Hill 18-10 and earns 0.150 quality points. Apex has a national power rating of 79.31, and East Chapel Hill has a national power rating of 75.16. But we don't want the national power ratings, because they are based on all games and other factors. We just want the 'Reg In' power rating, which for Apex is 80.60 and for East Chapel Hill 76.93. These values were found on the North Carolina NCHSWLA ratings page. Now if we examine the Apex team page and go to the second table and look for the East Chapel Hill game, we see that the predicted goal difference was 4. Since Apex was the favorite and won, we go to 'Winning team was the favorite' below and look for 'Predicted Goal Difference was = 04' and find the correction is 0.15.

Winning team was the underdog:
Predicted Goal Difference was = -01 cor = 0.275
Predicted Goal Difference was = -02 cor = 0.300
Predicted Goal Difference was = -03 cor = 0.325
Predicted Goal Difference was = -04 cor = 0.350
Predicted Goal Difference was = -05 cor = 0.375
Predicted Goal Difference was = -06 cor = 0.400
Predicted Goal Difference was = -07 cor = 0.425
Predicted Goal Difference was = -08 cor = 0.450
Predicted Goal Difference was = -09 cor = 0.475
Predicted Goal Difference was = -10 cor = 0.500

Winning team was the favorite:
Predicted Goal Difference was = 01 cor = 0.225
Predicted Goal Difference was = 02 cor = 0.200
Predicted Goal Difference was = 03 cor = 0.175
Predicted Goal Difference was = 04 cor = 0.150
Predicted Goal Difference was = 05 cor = 0.125
Predicted Goal Difference was = 06 cor = 0.100
Predicted Goal Difference was = 07 cor = 0.075
Predicted Goal Difference was = 08 cor = 0.050
Predicted Goal Difference was = 09 cor = 0.025
Predicted Goal Difference was = 10 cor = 0.000

Winning Team was neither the favorite/underdog:
cor = 0.25

Losing Team was the underdog:
Predicted Goal Difference was = -10 cor = -0.000
Predicted Goal Difference was = -09 cor = -0.025
Predicted Goal Difference was = -08 cor = -0.050
Predicted Goal Difference was = -07 cor = -0.075
Predicted Goal Difference was = -06 cor = -0.100
Predicted Goal Difference was = -05 cor = -0.125
Predicted Goal Difference was = -04 cor = -0.150
Predicted Goal Difference was = -03 cor = -0.175
Predicted Goal Difference was = -02 cor = -0.200
Predicted Goal Difference was = -01 cor = -0.225

Losing Team was the favorite:
Predicted Goal Difference was = 01 cor = -0.275
Predicted Goal Difference was = 02 cor = -0.300
Predicted Goal Difference was = 03 cor = -0.325
Predicted Goal Difference was = 04 cor = -0.350
Predicted Goal Difference was = 05 cor = -0.375
Predicted Goal Difference was = 06 cor = -0.400
Predicted Goal Difference was = 07 cor = -0.425
Predicted Goal Difference was = 08 cor = -0.450
Predicted Goal Difference was = 09 cor = -0.475
Predicted Goal Difference was = 10 cor = -0.500

Losing Team was neither the favorite/underdog:
cor = -0.25


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