Cumulative RT for Two Events

[Michiel Spape]

Hi,
Personally, I find feedback displays, which I expect you'll be using, a huge bother. They never exactly display what I want them to display, their default properties and colours are always off, and they stop the experiment from running as soon as their input object is missing. 

Instead, if you have two TextDisplays acting as stimulus displays, say Stim1 and Stim2, and both are responded to, what's the problem with:
1. Adding yet another textdisplay after Stim2, let's call it myFeedback. Don't add any text to it.
2. Adding an inline between Stim2 and myFeedback: myFeedback.Text = "Your cumulative reaction time was: " & cstr(Stim1.RT + Stim2.RT)
?

There's an example somewhere in the e-primer (though it might be an exercise?) on giving feedback based on the amount of correct responses within a block - http://www.cognitology.eu/pubs/AnE-Primer2009.pdf
Shouldn't be too difficult to change that into giving feedback based on the cumulative RT.

Cheers,
Mich

Michiel Spapé
Research Fellow
Perception & Action group
University of Nottingham
School of Psychology
www.cognitology.eu


-----Original Message-----
From: e-prime at googlegroups.com [mailto:e-prime at googlegroups.com] On Behalf Of Jordan Schoenherr
Sent: 23 September 2010 02:20
To: E-Prime
Subject: Re: Cumulative RT for Two Events

Hi David,

I'll definitely check this out. Concerning my meaning, I have two
successive events and I want to sum the RT for event 1 and event 2 to
create a cumulative RT.

On Sep 22, 5:27 pm, David McFarlane <mcfar... at msu.edu> wrote:
> Jordan,
>
> Just making sure...  Please be advised that "Cumulative" timing mode
> does *not* in any way, shape, or form produce a "cumulative RT",
> whatever that means.  Cumulative timing mode only affects how E-Prime
> schedules the onset time of the next object.  For details, study Chapter
> 3 of the User's Guide that came with EP; you might also look at my
> earlier post, "Mastering E-Prime: Meaning of all time audit measures" athttp://groups.google.com/group/e-prime/browse_thread/thread/39e899d34...
> .
>
> -- David McFarlane, Professional Faultfinder
>
>
>
> Jordan Schoenherr wrote:
> > And now for my final realization: if I turn off the logging function
> > for the second event, that should do the trick.
>
> > On Sep 22, 5:00 pm, Jordan Schoenherr <psychophysics.... at gmail.com>
> > wrote:
> >> I'll just post on my own thread:
>
> >> So it seems that each event that is given a cumulative value is placed
> >> in the RT recording sequence and RT feedback is provided for the final
> >> event. I'm still interested in whether I can use the acc from the
> >> first event in the feedback sequence?
>
> >> On Sep 22, 4:25 pm, Jordan Schoenherr <psychophysics.... at gmail.com>
> >> wrote:
>
> >>> Hi All,
> >>> As my subject indicates, I'm interested in obtaining the RT for two
> >>> successive events individually and cumulatively. The latter will be
> >>> used for feedback but have accuracy ONLY for the first event. Now,
> >>> from what I can tell, the experiment 'NestingXRT' provides an example
> >>> of how this can be accomplished.
> >>> In the second event, 'time audit only' is selected in the duration/
> >>> input window data logging and 'cumulative' is selected in the data
> >>> audit window. From what I can tell, this would seem to mean that this
> >>> event retains information from the previous two ('stimulus 1' and
> >>> 'stimulus 2'), however, I'm more concerned about where the
> >>> accumulation process starts and how this is specified.
> >>> In short,
> >>> 1) I want to record each event individually;
> >>> 2) I want to have a way to obtain the cumulative RT for events 1 and 2
> >>> (but not fixation or anything else that precedes the stims);
> >>> 3) Present RT feedback based on cumulative RT (but accuracy only for
> >>> the first event).
> >>> Any help would be of great assistance!
> >>> Cheers,
> >>> Jordan

-- 
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.
For more options, visit this group at http://groups.google.com/group/e-prime?hl=en.

This message and any attachment are intended solely for the addressee and may contain confidential information. If you have received this message in error, please send it back to me, and immediately delete it.   Please do not use, copy or disclose the information contained in this message or in any attachment.  Any views or opinions expressed by the author of this email do not necessarily reflect the views of the University of Nottingham.

This message has been checked for viruses but the contents of an attachment
may still contain software viruses which could damage your computer system:
you are advised to perform your own checks. Email communications with the
University of Nottingham may be monitored as permitted by UK legislation.

-- 
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.
For more options, visit this group at http://groups.google.com/group/e-prime?hl=en.