Hi there,<br><br>I have been puzzled by the following problem and would like to present an easy solution.<br><br>I want to present a search slide for exactly 200 ms and then to present a second 'response slide' for 5 seconds. If participants press a button during the response slide, the response slide should vanish, the trials should be ending and the next one starting. By using the extended response time I can accomplish reactions being recorded for the entire duration of the response slide (I set the time limit to 5200 ms).<br><br>The problem here was the "end action". If I use "terminate", a very early response will also terminate the search slide thus resulting in shorter presentation times than 200 ms (this is especially problematic since we are doing EEG here).<br>If I set it to "none" and the response slide to "-1", it works as intended only if participants react after search slide offset. If the respond before, they would have to press the button twice.<br><br>So what I did was to introduce a one-line script between search slide and response slide and a label "Label1" after the response slide:<br>if searchslide.RESP <> "" then goto Label1<br><br>This script checks if there was any response for the search slide and if so it jumps to Label1. If not, the response slide will follow and will be terminated by any button press.<br><br>The only concern I have is what happens if participants respond during the execution of the script (which should be less than a ms, but who knows...).<br><br>I would appreciate if this whole procedure would be possible without scripts and labels. This paradigm is quite common in experimental psychology I believe.<br>Maybe PST will implement it one day.<br><br>Tobias<br>
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