Hi-

Unfortunately, that is a much deeper/harder question than the methodology for calculation, and interpretation will depend specifically on your data and the hypotheses you are hoping to test.

The original ALFF/mALFF paper is by Zang et al. (2007), and the fALFF one is by Zou et al. (2008). The related parameter RSFA was introduced and discussed by Kannurpatti & Biswal (2008), and that might also help interpret the values. Working from there, you can check the literature on what those parameters are used for in general, and perhaps in the particular population in which you are looking (or in what you might expect to be a similar population, for the purposes of interpreting results).

--pt



Edited 1 time(s). Last edit at 12/14/2016 12:53AM by ptaylor.