I am having trouble using conditions to control the location of a stimulus. I have an experiment that has
Experiment->conditions->Procedure->Timeline->Stim (see attachment)
The idea is to place the same grating at different points along the X axis. There are two variables: red (indicating whether the grating uses the red gun) and posit (where the x position is).
The experiment runs. However there are two problems:
1: Only 1 block runs (even when I ask for more than 1)
2: The stimulus always appears in the center - as though the posit variable is not being interpreted. The 'red' variable >is< being interpreted and the color of the stimulus changes across presentations.
Any thoughts?
Thanks
Alex