You are perhaps referring to the Test for Additional Information which is a sub protocol after Analysis of Dispersion according to C.R. Rao (1965)  Linear Statistical  Inference and Its Applications. John Wiley & Sons, New York, 522pp.

I have produced two R scripts, Andy.R and Adinfo.R that run the initial Analysis of Dispersion and provides the data allowing Test for Additional Information which allows the question:

For Y1, Y2, Y3, .... Yp of a n by p Y observation matrix on the X n by q design matrix:

  does Y1 provide any additional information beyond Y2 - Yp on design feature w of design matrix X?

The R-scripts are available at URL:

http://www.bio.umass.edu/biology/kunkel/pub/r_scripts/andy/

These were designed for R running on a Mac which has minor graphical problems of compatibility with Windows PCs.   If you have problems running them we can communicate over the issues.