There is no set value for surface or volume. Typically we apply 5-10mm. Surface-based smoothing is more gentle than volume-based, so you can apply larger kernels.

On 8/5/2019 2:59 AM, Matthieu VANHOUTTE wrote:

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Hi Douglas,

I was talking about the FWHM smoothing to apply before statistical analysis. I know the FWHM to apply to a volume-based study but wonder what should be apply regarding the surface-based study?

Best,

Matthieu

On 04/08/2019 22:53, Greve, Douglas N.,Ph.D. wrote:
can you be more specific? What kind of effects?

On 8/4/2019 4:29 PM, Matthieu Vanhoutte wrote:
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Dear experts,

Knowing the size of the effects on volume-based data, does anyone would know a way to estimate the size of the effects on surface data?

Best,

Matthieu
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