current gpa has no effect on rate of IQ improvement.

but high school gpa does play a rather significant role in increase rate.   I'd guess it's somewhere over 30% of the total.  

Iguana, you've been playing this game a lot longer than me and generally command a lot more respect, but I really haven't seen evidence that HS GPA has more than MAYBE a 10% impact on the rate of IQ growth.

that what I would have believed as well until I actually mapped out a few hundred past players.
 
10 points of WE are equal to somewhere around .20 gpa.   And I'd guess the impact to be quite similiar.


for example, two guys that practically were the same in playing time and WE but had a difference in high school gpa:

Player A:  started with 2.75 gpa and had an avg career WE of 57.  He improved from D to A in 2275 practice minutes.  My expected time was 2270.  Right on average.

Player B:  started with 3.90 gpa and had an avg career WE of 58.  He improved from D to A in 1980 minutes vs the same expected  2270.  +290 minutes quicker over about 3 seasons or about 87% of the total time required. 

For their careers player B hit A+ and player A maxed out at A.  Player B was probably 20 practices of 20 minutes ahead of A after four seasons.

87% of the total time required over a fairly wide HS GPA range doesn't suggest to me how you're going to get it to a 30% factor...

Basically because there is not an absolute zero. Everyone improves at some rate.  If the bottom rate improves at 50% of the average rate, the variable distance between bottom and average is only 50 points rather than 100.

what would your assumptions be as to what percentage that each category factors in?  gpa, WE, playing time, other?

And again, I have a sampling of a few hundred players that makes me believe that WE may be "slightly" more important than high school gpa.  But it's a lot closer than what I originally believed.

I used to use the adjusted for class scale, but I've begun using 0 (5 for dumb froshes) and had no probelms - yet...