<div dir="ltr"><div>Hi E-prime staff! </div><div><br></div><div>I have a behavioral task that consists in a presentation of a stream of letters that appear in the center of the screen, where the participants should to respond pressing a button when the "x" letter is present and with other button to any other letter.</div><div><br></div><div>However, I need to present a "question trial" when the SD of the previous reaction times of trials is more a 2 SD, considering the enough trials, to make the average.</div><div>So my question is, how to program these trials "question" based on the SD of the previous Reaction times of trials of participants?<br></div><div><br></div><div> Looking forward to your precious comments and suggestions</div><div> </div><div>Thanks a lot!</div><div> </div><div>Best,</div><div> </div><div>Rodrigo.</div></div>
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