Capturing Late Responses

[David McFarlane]

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)

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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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