Question: Adjusting kappa for high absent ratings

#1
I am calculating kappa on a scale for which several variables had high absent ratings.

Can anyone shed some light on how to adjust kappa for high absent ratings?

Or: do you know of any resources (websites, books, etc.) that might be helpful with respect to kappa calculation/adjustment?
 
#2
Adjusting kappa - references

hunter1p said:
I am calculating kappa on a scale for which several variables had high absent ratings.

Can anyone shed some light on how to adjust kappa for high absent ratings?

Or: do you know of any resources (websites, books, etc.) that might be helpful with respect to kappa calculation/adjustment?
To answer my own question - in case it helps you:
See http://www.ptjournal.org/cgi/reprint/85/3/257 for a journal article that discusses kappa pros and cons, as well as adjustments that can be made to correct for the "cons".

BUT - I would be glad to hear of a kappa calculator (or SPSS syntax) that makes these adjustments. I have a lot of variables and little time, so I am trying to avoid the manual route.