Hi,
The nFC Procedure actually automatically generates the stimulus instances, so you should not have to provide each of them explicitly. For a spatial nFC, the location of each instance will be defined based on the selected spatial splitting mode and the specified eccentricity. The value of the judged parameter for each instance will be randomly assigned so one instance will get the value specified by the method (i.e. the parent event of the nFC Procedure) combined with the pedestal value and the other instances set with the pedestal value only.
Have a look for example at the "Orientation Discrimination" tutorial:
http://www.psykinematix.com/documentation/latest/Psykinematix%20Help/Lessons/Orientation_Discrimination_Lesson_1.htmlIf you tucked two stimuli underneath the nFC Procedure event then they will be considered as a single stimulus interval (with 2 sub-stimuli presented sequentially for each instance of the nFC procedure). Depending on what your experimental task is, you may have to structure your events hierarchy differently.
You should be able to attach images now by the way.
Hope this helps!
-- The Psykinematix Support Team @ KyberVision Japan LLC