incrementing the trial count

Thu Oct 13 17:08:24 UTC 2011

Hi Mich,
Thank you very much for the trick. You are right that I can enter the
subject numbers manually during the experiment (which I have been doing
until now). When I am not here it gets mixed up as the person running the
subject does not know how to change the subject name or too busy to remember
it. Therefore, I decided to minimize the user role in the task. Although
the task is a passive task I am using the Edat files to cross check the
system delays, netstation triggers, etc. I feel like it is essential to
cross check everything.
I also like the idea decreasing the number of counter (in e-PRIMER). I was
thinking to implement that logic. I know the total number of trials I wanna
run . Therefore, I can define a counter and count down. We will all see how
it goes down to the road as I have a lot of challenges which will be
discussed in the forum.
Cheers,
Meltem

On Thu, Oct 13, 2011 at 8:41 AM, Michiel Spape <
Michiel.Spape at nottingham.ac.uk> wrote:

> Hi,****
>
> So, do I understand correct you want to use the same e-prime data-file for
> more than one subject? Any good reason for that? Normally, I’d say, just
> rerun the experiment, type in subject number, and from the .edat files,
> filter out those subjects who have few data (in E-DataAid, count number of
> trials, write those subjects with few trials on a piece of paper, and filter
> those out from analysis) – I think that’s pretty much what we always do
> (whether subjects be infants or psych students). What you seem to want to do
> is rather counterintuitive: if a participant completes 60% of trials, at
> which point you want to increase subject number, why should this participant
> suddenly have 2 subject numbers (so that subject with the next subject
> number, which is actually the same subject, now has 40% of trials at most)?
> Why not just create a filter? You can even do that online:****
>
> Create user script (global, alt+5, user tab) variables:****
>
> Dim TotalTrials as integer****
>
> Dim PropDone as double****
>
> Initialise variable (only TotalTrials, because initialising in basic also
> sets to 0), by adding to beginning of experiment (upmost procedure, before
> everything else):****
>
> TotalTrials = 300 ‘or whatever is the maximum****
>
> Check to see, during each trial, how far the subject is, by adding to end
> of trial procedure:****
>
> PropDone = PropDone + 1 / TotalTrials****
>
> c.SetAttrib “PropDone”, PropDone****
>
> ** **
>
> voila, and by finding the maximum of propdone, per subject, you can find
> how many trials the participant has done. You can take it from there, coding
> the participant number, for whatever reason, in there as well (I’d just
> suggest not to use the subject number attribute) and increasing it if need
> be.****
>
> ** **
>
> If, on the other hand, you’re doing some infinite loop thing, where you
> want ALL infants in 1 edat, perhaps it might be a good idea to build in a
> sneaky key. So that, if you have some textdisplay, and you press X (for
> next), a variable is updated:****
>
> User script:****
>
> Dim CurrentParticipant as Integer****
>
> Initialise:****
>
> currentparticipant = c.GetAttrib (“Subject”)****
>
> ** **
>
> After critical stimulus:****
>
> If myCriticalStimulus.RESP = X then currentparticipant = currentparticipant
> + 1****
>
> c.SetAttrib “CurrentParticipant”, currentparticipant****
>
> ** **
>
> Something like that. Hope that helps.****
>
> Best,****
>
> Mich****
>
> ** **
>
> ** **
>
> ** **
>
> *Michiel Spapé*
>
> *Research Fellow*
>
> *Perception & Action group*
>
> *University of Nottingham*
>
> *School of Psychology*
>
> *www.cognitology.eu***
>
> ** **
>
> *From:* e-prime at googlegroups.com [mailto:e-prime at googlegroups.com] *On
> Behalf Of *Meltem BALLAN
> *Sent:* 13 October 2011 13:01
> *To:* e-prime at googlegroups.com
>
> *Subject:* Re: incrementing the trial count****
>
> ** **
>
> Hi All,
>
> Thank you.I did all you described but somehow I could not call from another
> function. I am running infant subjects. So it is not a case for me to
> complete the task 60% of the time. Therefore, I wanna count the max number
> of trials. If it is more than 60%  I wanna increase the subject number. I
> followed instructions but  increment did not work.
> Thanks
> Meltem****
>
> On Oct 13, 2011 7:02 AM, "liwenna" <liwenna at gmail.com> wrote:****
>
> Not sure if this is what you're looking for (if I remember correctly
> the e-primer is quite clear on this one) but you did add an inline
> that increments the value assigned to totaltrial on each trial? I.e.
> an inline on the proc reading:
>
> totaltrial = totaltrial +1
> (followed by another line to log it onto the attribute trialcount: c.
> SetAttrib "TrialCount", totalTrial)  ?
>
> On Oct 12, 7:02 pm, Meltem BALLAN <meltembal... at gmail.com> wrote:
> > Mich,
> > No worries. I was looking to find a source. I used the explanation in the
> > E-PRIME documentation but did not work. I read the E-PRIMER. It must be
> > something I am missing within the lines.
> > Thanks
> > Meltem
> >
> > On Wed, Oct 12, 2011 at 12:49 PM, Michiel Spape <
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > Michiel.Sp... at nottingham.ac.uk> wrote:
> > > Hi Meltem,****
> >
> > > Not to sound sour, but these are quite elementary questions for which I
> > > think you might really want to do a quick walk through some tutorials.
> For
> > > example, our very ownhttp://step.psy.cmu.edu/materials/EPrimer.pdfhasan
> > > almost exact answer to what you seem to be looking for, in one of the
> two
> > > last chapters. Also, the quick start is a very useful way to begin. I
> think,
> > > with some additional information (such as what do you mean by Stimulus
> > > count?), anybody could answer your question, but you’d really be doing
> > > yourself a favour to take two days to learn how to use the software.
> Sorry
> > > to be not of more use.****
> >
> > > ** **
> >
> > > Best,****
> >
> > > Mich****
> >
> > > ** **
> >
> > > *Michiel Spapé*
> >
> > > *Research Fellow*
> >
> > > *Perception & Action group*
> >
> > > *University of Nottingham*
> >
> > > *School of Psychology*
> >
> > > *www.cognitology.eu***
> >
> > > ** **
> >
> > > *From:* e-prime at googlegroups.com [mailto:e-prime at googlegroups.com] *On
> > > Behalf Of *Meltem BALLAN
> > > *Sent:* 12 October 2011 17:42
> > > *To:* e-prime at googlegroups.com
> > > *Subject:* incrementing the trial count****
> >
> > > ** **
> >
> > > Hi All,
> > > I have a question that I cannot figure out by myself. I am trying to
> add a
> > > counter in my task which is counting the total number of trials during
> the
> > > task. I defined a global variable as totalTrial (in User Script) and
> > > assigned it as TrialCount (c. SetAttrib "TrialCount", totalTrial). My
> > > dillemma is how I can integrate TrialCount with my Stimulus count.
> > > I tried as Trial=TrialCount but it did not work.
> > > Any idea?
> > > Thanks
> > > Meltem
> >
> > > --
> > > Meltem Ballan, PhD
> > > Department of Psychiatry, CB# 7160
> > > University of North Carolina School of Medicine
> > > 7023 Neurosciences Hospital
> > > Chapel Hill, NC 27599-7160****
> >
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> > --
> > Meltem Ballan, PhD
> > Department of Psychiatry, CB# 7160
> > University of North Carolina School of Medicine
> > 7023 Neurosciences Hospital
> > Chapel Hill, NC 27599-7160
>
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-- 
Meltem Ballan, PhD
Department of Psychiatry, CB# 7160
University of North Carolina School of Medicine
7023 Neurosciences Hospital
Chapel Hill, NC 27599-7160

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