You can use either scans or seconds; however, both the onsets and
durations need to be in the same units.
Best Regards, Donald McLaren
=================
D.G. McLaren, Ph.D.
Research Fellow, Department of Neurology, Massachusetts General Hospital and
Harvard Medical School
Postdoctoral Research Fellow, GRECC, Bedford VA
Website: http://www.martinos.org/~mclaren
Office: (773) 406-2464
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On Thu, Jan 3, 2013 at 5:57 PM, Wen-Jui Kuo <[log in to unmask]> wrote:
> Dear all,
>
> I have a quick and small question for 1st-level model setting.
>
> From SPM 8 manual, it tells us that unit of design for the onsets of
> events or blocks can be specified in scans or seconds.
>
> Do I need to use the same unit type for variable event duration
> setting in the following?
> In other words, when I want to give a value for a condition for its
> duration in an event-designed model, what unit should I use, second or
> scan?
>
> Thanks in advance for instruction.
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