Print

Print
Hi:

1) normally different conditions would be different EVs - ie different timings files - and in such cases the 3rd column would be all "1" for each EV

2) however, if these blank periods are your "rest" condition, you would not normally explicitly model that with an EV, as everthing gets demeaned in the timeseries modelling.

Cheers.




On 16 Jul 2014, at 18:21, Mayte Parada <[log in to unmask]> wrote:

Hello,

I'm attempting to customize my EV files for FEAT and am not absolutely clear on the 3rd number that represents the value of the stimulus. I have participants viewing videos and between those videos are blank periods where they are watching a black screen. I want to model this into the analysis but not sure of the value to give. The values of the videos were given a 1, should these be the same? Any suggestions would be great for this newbie :)


---------------------------------------------------------------------------
Stephen M. Smith, Professor of Biomedical Engineering
Associate Director,  Oxford University FMRIB Centre

FMRIB, JR Hospital, Headington, Oxford  OX3 9DU, UK
+44 (0) 1865 222726  (fax 222717)
[log in to unmask]    http://www.fmrib.ox.ac.uk/~steve
---------------------------------------------------------------------------

Stop the cultural destruction of Tibet