> I am wondering if anyone has an opinion about the
> appropriateness of using z scores in a group analysis (i.e., using z
> scores as the DV) rather than something like percent signal change
> or the parameter estimate itself.
Sometimes you have to convert the values (for example correlation coefficients) to z-score berfore you run group analysis. When percent signal change is available from individual subjects, I fail to see how the z-score conversion is done. From t values or percent signal change? Maybe a concrete example is more helpful.
Gang