Dear David, <div><br></div><div>Thank you very much for your help! The wait function is so useful and I finally got my experiment working thanks to your help! </div><div><br></div><div>I really appreciate you taking the time to reply, and I hope you have a great Christmas and New Years!</div><div>Best wishes,</div><div>Alice</div><div><br></div><div><br><br>On Wednesday, December 5, 2012 8:57:35 PM UTC, McFarlane, David wrote:<blockquote class="gmail_quote" style="margin: 0;margin-left: 0.8ex;border-left: 1px #ccc solid;padding-left: 1ex;">Alice,
<br>
<br>Two brief thoughts...
<br>
<br>1) You can use List.Terminate to exit out of a running List before it
<br>reaches its own end -- see that topic in the E-Basic Help facility.
<br>(With a bit of programming knowhow you don't even have to know the name
<br>of the running List, but I am not near my FAQ now to point you to the
<br>thread where I show that.)
<br>
<br>2) Yes, adding up times is fraught with difficulty, you will almost
<br>certainly fail to include some interim times and get wrong values. But
<br>the E-Prime input mask facility really is beautiful once you fully
<br>understand it. Put a Wait object just before the start of your
<br>stimulus/response loop, outside the loop. Give that Wait a Duration of
<br>0 (and think about the proper Onset Sync), and add your desired input
<br>mask to this Wait instead of within the loop. Give this input mask a
<br>Time Limit of (infinite). Now that Wait will look for a response any
<br>time during your stimulus/response loop, and Wait.RT will be the RT from
<br>the start of the loop until the response, without you having to compute
<br>anything! My online E-Prime course actually includes an exercise where
<br>we do this, might be worth looking into.
<br>
<br>-----
<br>David McFarlane
<br>E-Prime training online:
<br><a href="http://psychology.msu.edu/Workshops_Courses/eprime.aspx" target="_blank">http://psychology.msu.edu/<wbr>Workshops_Courses/eprime.aspx</a>
<br>Twitter: @EPrimeMaster (<a href="http://twitter.com/EPrimeMaster" target="_blank">twitter.com/EPrimeMaster</a>)
<br>
<br>
<br>Alice Cai wrote:
<br>> Dear David,
<br>>
<br>> Thank you so much, that was very helpful! Right now I have only one
<br>> slide, and have many levels in the list to code for the location of the
<br>> square (e.g., left, middle, right). I would like the slides to repeat
<br>> itself until participants give a response. Once participants give a
<br>> response, I want to give a 'feedback display'. I thought of using the
<br>> jump function with labels, but the label can only jump within a
<br>> procedure. This is a bit problematic because right now, even when
<br>> participants give a response, it will only exit the procedure once all
<br>> lists have been displayed (or when it reaches a time limit that I set,
<br>> e.g., 4000 ms).
<br>>
<br>>
<br>> Also, I need to record reaction time to the moving stimuli. However,
<br>> right now e-prime doesn't record RT from the very first slide that
<br>> participants see, but only for the slide that the responded to. So in
<br>> order to know how long participants took to respond, I will need to add
<br>> up the number of slides that was presented before hand and multiply it
<br>> by how long the slides were displayed for (50 ms). Is there an easier
<br>> way to record reaction time?
<br>>
<br>> Thank you very much for your help, please take your time to reply and
<br>> any comments will be greatly appreciated!
<br>>
<br>> Thank you again!
<br>> Alice
<br>>
<br>>
<br>>
<br>> On Wednesday, December 5, 2012 4:39:07 PM UTC, Alice Cai wrote:
<br>>
<br>> Hi,
<br>>
<br>> I have a question regarding my experiment design. I would like to
<br>> create a moving stimuli where participants decide whether the box is
<br>> moving vertically or horizontally. I know that I can use different
<br>> slides changing at 50 ms. per slide with different locations for the
<br>> box (left, middle, right) but the problem is I will need to create a
<br>> lot of slides and the E-prime program runs out of memory space.
<br>>
<br>> Is there any way to create just three slides, and have E-prime
<br>> repeat these three slides until participants give a response? And
<br>> then the experiment will jump to the next trial with three more slides?
<br>>
<br>> Any help will be greatly appreciated! Thank you!
<br>
<br></blockquote></div>
<p></p>
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