As you want to do what the previous paper did, you need to create your ROIs from your one-sample t-test. Then, extract the data for each ROI and for each movement speed and use your favourite statistical program (e.g. STATA, SPSS, SAS, etc.) to do the two-way ANOVA of ROI and movement speed.

SPM is not equipped to do a two-way ANOVA between regions.

Best Regards, Donald McLaren
=================
D.G. McLaren, Ph.D.
Research Fellow, Department of Neurology, Massachusetts General Hospital and
Harvard Medical School
Postdoctoral Research Fellow, GRECC, Bedford VA
Website: http://www.martinos.org/~mclaren
Office: (773) 406-2464
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On Mon, Dec 16, 2013 at 9:48 AM, Aser A <[log in to unmask]> wrote:

Hi all,

I have an experiments that contains three type of movement: slow
movement, mid movement, and fast movement.

How can I see the effects of changing the speed movement on different
brain regions?

For example, what I would like to do is to create 10 ROIs. Then I
would like to see the beta value of these ROIs at each level of
movement. Then I would like to plot this relation. I want to do this
at the group level.

What I have done at the within subject level is the following:

I defined three regressors : slow, mid, and fast.

I then defined four contrast: slow vs rest, mid vs rest, fast vs rest,
and the summation of ( slow + mid + fast ) vs rest.

I thought of the following:

I do a between subject analysis : one sample t test of the summation
contrast, then I defined the ROIs. But here is the missing part for me
how to see the effect of movement speed on these ROIs.

I found a paper that is somehow similar to what I would like to do.
However, they did not use SPM and they used a two way anova.

Keisker, Birgit, et al. "Differential force scaling of fine‐graded
power grip force in the sensorimotor network." Human brain mapping
30.8 (2009): 2453-2465.

I really would like to to get similar approach to what they did and
similar observation or results.

So any advice will be for sure appreciated,

Many thanks,

Aser S