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[open] Stimulus presentation and keyboard response

edited June 2013 in OpenSesame

I am making an n back task that I will be using for an fMRI experiment. I am having trouble understanding how to setup the sketchpad and keyboard response items to get the behavior I want.

This is each trial should work:
Display stimulus for 500ms.
Display fixation dot for 1500 ms.

Collect a response provided any time during that period and don't change the screen in response to a keypress. This way the timing of each trial is constant.

How would I set this up in open sesame?

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