Three sketchpads to show different stimuli, depending on the reaction
I'm trying to build an experiment which causes some issues for me.
There are six positions and in every trial you see two stimuli at two of those six positions. One stimulus is a number, the other one is a symbol and you should react with certain keys on the keybaord to those stimuli. If you press the key for the number, it should disappear and only the symbol should be left on the sketchpad. If you react on the symbol, the number should be left on the screen.
My first idea was to create three sketchpads. The first one shows both stimuli. The other two sketchpads show either the number or the symbol, depending on the reaction. But what should be the condition for the second and third sketchpad? If I choose "show if [correct]=1" it won't work, because both reactions (number and symbol) would be correct.
To see if this idea with three sketchpads could work at all, I set the reaction on the number as "correct" and everything else as "wrong". The first trial shows the first sketchpad with both, the number and the symbol. When I react on the number, the sketchpad, which shows the symbol only, appears. So everything's fine so far. But then I react on this symbol and when the second trial starts, the first sketchpad will be skipped and the second sketchpad will be shown immediately with only the number.
Is it even possible to do this with multiple sketchpads or is an inline script necessary for this experiment?
I hope the problem is clear, but if further explanation is needed, I'll give some more details about the experiment.