Capturing Late Responses

[Andrew]

Hi David,

Thank you for your reply. I actually was using the Extended Input
(i.e., the Time Limit field of the slide objectt); the problem turned
out to be another issue. I was using c.GetAttrib to return the value
of the object attribute, when I should have just used the variable
name.


Thanks,

-Andrew

On May 17, 2:55 pm, David McFarlane <mcfar... at msu.edu> wrote:
> Andrew,
>
> You are going about this the wrong way.  You just need to use
> "extended input", this is covered in Appendix C of the User's Guide
> that came with E-Prime.  While you are at it, you really owe it to
> yourself and everyone else to work through *all* of the tutorials in
> *all* the supplied documentation before you do any work in E-Prime.
>
> Regards,
> -----
> David McFarlane
> E-Prime training
> online:  http://psychology.msu.edu/Workshops_Courses/eprime.aspx
> Twitter:  @EPrimeMaster (twitter.com/EPrimeMaster)
>
> [Stock reminder:  1) I do not work for PST.  2) PST's trained staff
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>
> At 5/17/2012 02:30 PM Thursday, Andrew wrote:
>
>
>
>
>
>
>
> >I am currently designing an experiment which includes the capturing of
> >responses that are correct, but occur after the end of stimulus
> >presentation. For example, a Stroop cue may be presented for 600ms,
> >and the subject makes the correct response at 650ms, after the Stroop
> >cue has disappeared. I would like to be able to use the .ACC and .RT
> >attributes of the Stroop slide when creating new variables at the
> >trial level, and not have them default to zero if the subject does not
> >respond within 600ms of the onset of the Stroop cue.
>
> >I have partially figured out a way around this, by including a
> >textslide called "CaptureLateResponses" immediately after the Stroop
> >slide (let's call it "StroopSlide"). The duration of the StroopSlide
> >is 600ms and the duration of the CaptureLateResponses textslide is
> >400ms, for a total of 1000ms for the subject to make a valid response.
> >I have set the TimeLimit on the StroopSlide to be 1000ms, in order to
> >capture late responses. I have set the timing of both slides to
> >Cumulative, and I have set both to standard logging.
>
> >However, I am unable to store properties of the StroopSlide object
> >into variables at the trial level. For example, I wish to include only
> >trials in which both the current response and the previous trial's
> >response are correct. However, when I try to create this variable, I
> >find that, if the subject has not responded within the 600ms time
> >window that the StroopSlide object is present, both the accuracy and
> >response time attributes are set to zero. However, in the output edat
> >file, these values are processed normally, with responses slower than
> >600ms recorded in the StroopSlide.RT attribute, and correct responses
> >made after the 600ms time window recorded in the StroopSlide.ACC
> >attribute. Furthermore, when I insert a feedback slide after the
> >StroopSlide and CaptureLateResponses textslide, it appears to process
> >correct and incorrect responses normally, with late correct responses
> >still interpreted as correct.
>
> >Any feedback on why this is, and how to resolve this situation, would
> >be greatly appreciated.
>
> >Thank you,
>
> >-Andrew

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