2011/3/1 春亮 <[log in to unmask]>:
> Hi, All.
> The following might be a question asked before, and we are meeting the
> same problem now, because we can't not find the corresponding code in the
> MarsBaR Documentation. Can anybody get us out of this problem?
> Recently I read an article from J Cogn Neurosci. When the authors
> did the ROI analysis, they used Mean Parameter Estimate to copaire
> difference of activation between conditions. I'm wondering what's that
> Mean Parameter and how can we do that except for extracting percent of
> activated voxels. That article is as follows:
> Quadflieg, S., Turk, D. J., Waiter, G. D., Mitchell, J. P.,
> Jenkins, A. C., & Macrae, C. N. (2009). Exploring the neural
> correlates of social stereotyping. J Cogn Neurosci, 21(8), 1560-1570.
I think you want the marsbar mailing list for this question.
It wasn't completely clear to me on a first scan of the paper, but I
think they mean that they first calculated SPM first-level analysis to
get the beta (parameter estimate) images, and then used marsbar to get
the (mean of the beta values within the ROI voxels) for each beta
image of interest. I hope I read it correctly.