Hello
I have run Featquery (with analyze mask images) on a series of FEAT
higher-level folders generated in FSL 3.3, but that used first-level
analyses from FSL 3.2. I found differences (as big as 0.1%) between
the COPE % values of the higher-level analyses and the average of the
first-level results.
I checked whether using first-level analyses from FSL 3.2 could have
generated this difference by comparing the Featquery results for
first-level analyses carried out in both FSL 3.2 and FSL 3.3 for the
same data. This resulted in some minor differences, however it seems
that they are unlikely to account for the discrepancy reported above
as this was also present for a subset of the data for which both
first- and higher-level analyses were run in FSL 3.3.
Has anyone encountered a similar difference and do you know where it
stems from? In general, should we expect to find differences in the
Featquery results for higher-level analyses depending on the FSL
version used for the first-level?
Many thanks
Lori
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Dr Lori Minini, PhD
Department of Physiology, Anatomy and Genetics & FMRIB Centre
University of Oxford
Sherrington Building
Parks Road
Oxford OX1 3PT
tel +44-1865-272555
fax +44-1865-272543
email [log in to unmask]
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