You should just set it to the duration of your event. If all your events
are of the same duration, then use that duration. If your events are of
different durations, then use the average. This is a scaling parameter,
so it will have no effect at all on p-values either at the lower or
higher lev
Hi FreeSurfer Team,
I was wondering if you could provide a bit more clarification on what the
"-refeventdur" flag is referring to in the mkanalysis-sess command? The
description in the help screen states it should be the "duration (sec) of
reference event for scaling." I am unsure what the "refer
It has no influence on the design matrix. It controls a scaling factor
so that the beta value (regression coef) will equal to the height of the
hemodynamic response when viewed in the raw data. This sounds like it
should be simple but it is actually quite tricky. The bottom line is
that it is
Hi,
I am making an analysis in freesurfer 5.1 using mkanalysis-sess and I am a bit
confused about the flag refeventdur. In the help it is said that it should be
set to the event duration if the events have similar durations. But I have two
conditions with different durations that one lasts for
Hi Maryam, yes, I admit, that is a confusing option. The "events" that
the help refers to only apply to task events (not the fixation). In your
case, you would just set it to 16 sec.
doug
On 9/8/11 10:55 PM, Maryam Vaziri Pashkam wrote:
Hi,
I am making an analysis in freesurfer 5.1 using mka
Hi,
I am making an analysis in freesurfer 5.1 using mkanalysis-sess and I am a
bit confused about the flag refeventdur. In the help it is said that it
should be set to the event duration if the events have similar durations. I
have four conditions that last for 16 second each in a block design
par
