Hi,

The HP filter should be applied to both your data and the design matrix.  The data control is, as you said, located in pre-stats tab and the design HP filter control is found in the stats/Full model setup GLM gui (apply temporal filtering check boxes). So, the single HP setting under the Data tab is what gets applied in these two places and it is important that if the HP filtering is done that it is done identically to both the data and the design. 

So, in your case when you run your stats you still see the HP filtering under the Data tab because you still need to apply it to your design matrix.  When you run prestats and stats separately be sure that you match the HP filter cutoff of both so that your data and design match.

Cheers,
Jeanette

On Fri, Nov 11, 2011 at 10:36 AM, Torsten Ruest <[log in to unmask]> wrote:
Hi there,

I just came across something I took for granted, but now I am not sure anymore. OK here it is:

I preprocessed my data (prestats) with temporal filtering set to highpass and in the data tab high pass filter cutoff is set to 100 s. Question is, does the activation of  the temporal filtering in the pre-stats tab activate the 100 s filter in the data tab? In other words, I want to do now stats only on the preprocessed data and I never really thought about the filter in the data tab. Will it be applied twice now, or does the tick in the pre-stats tab (which is now inaccessible) trigger it. I compared the 2 filtered images (preprocessing vs stats output) and they are same, so I think it's not been applied a 2nd time...

Sorry for this question, but I was just wondering...

Thanks for your response!

Torsten