Hi,
Are you sure that this isn’t just an issue with the png image display? It possibly is not generating an accurate enough display, which can be particularly true if you have a long experiment. Try having a look at the design.mat file and see if that contains the events that you are interested in. If you make a copy of this file, then remove all the lines up to and including the “/Matrix” line, you can load the result into matlab, octave, python, excel, spss, or whatever your favourite program is and then check the contents that way.
If that all looks fine then please give us more details about your setup (e.g. TR, number of volumes, timing of the problem EVs, etc.)
All the best,
Mark
> On 19 Nov 2014, at 15:43, Andrew Ji <[log in to unmask]> wrote:
>
> Hi Stephen,
>
> The duration ranges from 0.2-0.5 seconds. It also doesn't explain why if I change the event onset time while keeping the duration constant, the bar appears again in the GLM.
>
> Thanks!
> -Andrew
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