Not the motion problem. I suspect individual difference in hemodynamic
response function without much evidence.
Thanks
On Jan 22, 2008, at 8:55 PM, Hongjian He wrote:
> Dear Xu,
> Do you mean these subjects have no significant BOLD changes even
> in single case analysis? If do, I think you should go backforward to
> have a look at their headmotion etc., since these may affect the BOLD
> signal.
> Anyway, BOLD changes in event related experiment are always to small
> and easily to be flushed by the noise.
>
> Hope these may helps.
> Sincerely yours,
> Hongjian
> --
> 何宏建
> Bio-X Lab, Physics Department, Zhejiang University.
> Zheda Road 38, Hang Zhou, China.
> 310027
> Phone: 86-571-87952811
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