By Reshan - 6/7/2016
Hello,
I want to present a fixation cross for 500 ms, and then a stimulus for 500 ms, and allow the participant as much time as they want to respond.
However, I would also like to end the trial as soon as the participant responds (if they respond after the presentation of the stimulus- i.e. after 500 ms)
What command line do I need to add?
<trial labelAright>
/stimulustimes = [0= fixation; 500=stimuliA; 1000= blankshape]
/validresponse = (18, 23)
/correctresponse = (23)
</trial>
Thank you very much for the help!
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By Dave - 6/7/2016
By default, a <trial> will start accepting responses ony after all stimuli specified in /stimulustimes or -frames have been displayed.
To override this, you use the /beginresposetime attribute, i.e., in your case you specify:
<trial labelAright>
/stimulustimes = [0= fixation; 500=stimuliA; 1000= blankshape]
/validresponse = (18, 23)
/correctresponse = (23)
/ beginresponsetime = 500
...
</trial>
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