Moving Stimuli in E-prime

[Alice Cai]

Dear David, 

Thank you very much for your help! The wait function is so useful and I 
finally got my experiment working thanks to your help! 

I really appreciate you taking the time to reply, and I hope you have a 
great Christmas and New Years!
Best wishes,
Alice



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

-- 
You received this message because you are subscribed to the Google Groups "E-Prime" group.
To post to this group, send email to e-prime at googlegroups.com.
To unsubscribe from this group, send email to e-prime+unsubscribe at googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msg/e-prime/-/J2FeB8kHJWYJ.
For more options, visit https://groups.google.com/groups/opt_out.


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listserv.linguistlist.org/pipermail/eprime/attachments/20121212/45e737bd/attachment.htm>