afni.nimh.nih.gov

Thanks Gang.

A related question:

A referee recommended to calculate the conjoint significance between 2 maps in a conjunction analysis using the Fisher's tecnique, that is, by calculating

chi square = -2ln(p1*p2)

, where p1 and p2 are the level of significance (one-tailed) of the two individual maps.

I have two questions: First, do you think this method of estimating conjoint significance is correct?

Second, because my AFNI maps are two-tailed, should I use p1/2 and p2/2 in that equation?

Elisa