Hi, SPMers,
We met a problem on high pass filter and don't know what value should be chosen as a high cut off.
Our experiment was block-designed with TR = 2s, 12 scans(=24s) for each task/control block and a total of 96 images( 8 blocks) collected.
During SPM modeling, we used 1/128 (as default) and 1/130 for high cut off. However, but got totally different results finally.
I wonder why such small changes to the filter can result in big difference in finally result, and then how to make a good and resonable filter.
Best regards!
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何宏建, He Hongjian
Biox laboratory of physics department, Zhejiang University.
Zheda Road 38, Hang Zhou, China.
310027
Phone: 86-571-87952811