Dear Dr. Alfonso,

I have two questions regarding implementation of BPF during the denoising step:

1. In a typical SPM analysis, we usually implement a high pass filter that is twice the cycle length. When doing a connectivity analysis in Conn, should I use the same value (i.e. BPF with lowerbound = 2xcycle length and upperbound = Inf) in the denoising step or use [0.008 Inf] (block design/task based experiment)?

2. If we are to implement HPF (twice the cycle length), and let's say that different groups of subjects have different block length, can we specify different denoising parameters for different subjects?


Thank you for your time


Warm Regards

Pravesh Parekh