Use the avb, that's an F signed by the sine component of the FFT at
the fundamental.
On Wed, 4 Jul 2007, Lars Kuchinke wrote:
thanks jonathan & doug,
is it appropriate to use the avb contrast (all vs baseline ?) or do i have
to compute a two-sided 1 -1 f-contrast?
lars
Jonathan Polimen
thanks jonathan & doug,
is it appropriate to use the avb contrast (all vs baseline ?) or do i
have to compute a two-sided 1 -1 f-contrast?
lars
Jonathan Polimeni schrieb:
hi lars,
i just checked with doug, and he agreed that, since your stimulus is
periodic, 'sfa-sess' can do the job provi
Actually, you can do it either as a simple blocked design where you
specify the timing of each block as described below or as an AB-Blocked
design. If they latter, then you would run mkanalysis-sess with
-designtype abblocked and then use sfa-sess. If you use -designtype
blocked, then you wo
hi lars,
i just checked with doug, and he agreed that, since your stimulus is
periodic, 'sfa-sess' can do the job provided that you specify that the
analysis should be carried out using a block design.
so, for example, if the TR is 2 sec, and since each of your conditions
lasts 20 TRs per epoch
thanks Jon,
i didn't know that a simple block design analysis is possible to compute
the visual area boundaries...
(which is the reason why I tried to fit it into the standard sfa-sess
analysis)...
could you explain me (shortly) what to do than with my data
regards,
Lars.
-design info: 8hz f
hi lars,
the FSFast retinotopy analysis stream is geared towards temporal phase
encoded data analysis, which produces field sign maps that can be used to
define area boundaries.
if you opt to use stationary wedge stimuli to activate the horizontal and
vertical meridian representations in visual
Hi all,
I used a retinotopy paradigm with two horizontal and vertical wedges
located at the meridians (flickering at 8Hz, switching every 20 seconds)
do you think that this paradigm does fit into fsfastretinotopy analysis?
I'm not sure if it makes a difference compared to rotating edges...
A
