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Hi,

Yes, the Highpass checkbox under prestats is for the data and the "apply temporal filtering" checkboxes under the General Linear Model window are for the EVs in your design.  So if you only wanted to filter EVs, turn it off under prestats (the cutoff in the Data tab will be used).

You could just add nuisance variables to the design matrix directly instead of running a separate model and then you don't need to worry about all of this.

Jeanette

On Wed, Oct 10, 2012 at 5:46 PM, Tara Patterson <[log in to unmask]> wrote:
Hi, I would like to run a PPI analysis using residuals from a nuisance analysis as the 4D data input. In the nuisance analysis I applied highpass temporal filtering. If I turn off highpass temporal filtering for the level 1 PPI analysis (uncheck Highpass under Pre-stats and uncheck Apply temporal filtering under Stats), the temporal filter will be applied only to the data and not to the model, correct? (Which is bad, correct?) So can I remedy this by doing the following for the level 1 PPI: 1) specify the same filter that I used in the nuisance analysis in the Data tab, 2) uncheck Highpass under Pre-stats, and 3) check Apply temporal filtering for the psychological EVs? Will this ensure that the data are only filtered once (during the nuisance analysis) and that the filtering applied to the data matches the filtering applied to the model? Thanks.