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Hello, Thank you. Hmm. Well I can't provide details on the script at this particular moment. Although it was an on-off block design being utilised if that helps. On Wed, Aug 2, 2017 at 11:13 PM, Eugene Duff <[log in to unmask]> wrote: > Hi - > > You can certainly have a negative BOLD response to an event, relative to > rest. You need to give more details for us to give more specific insight > into the effects. > > Best > > Eugene > > On 2 August 2017 at 23:02, Aaron Ben Mansel <[log in to unmask]> wrote: > >> Hey Kristian, >> >> Thanks for the reply. That's entirely possible. I will need to double >> check the scripts. What exactly would a negative percent signal change mean? >> >> Thanks, >> Ben >> >> On Wed, Aug 2, 2017 at 8:30 PM, Kristian Loewe <[log in to unmask]> >> wrote: >> >>> Hi Ben, >>> >>> Could it be that your time series are being standardized or transformed >>> to percent signal change at some point in your analysis? >>> >>> Cheers, >>> Kristian >>> >>> On 02.08.2017 20:13, Ben Mansel wrote: >>> >>>> Hello, >>>> >>>> This isn't related to FSL - but I am desperate and thought some of the >>>> members here would be able to assist. >>>> >>>> I have ran analysis on my functional MRI data using a script provided >>>> by somebody else. Problem is, I am not entirely sure what the output is. >>>> >>>> The numbers I have for the ROIs should be representing 'Response >>>> Magnitude'. However, there are some negative numbers. I was under the >>>> impression that a negative magnitude doesn't exist, and I am confused as to >>>> how this should be interpreted. >>>> >>>> Any help would be seriously appreciated. >>>> >>>> >> >