feedback on accuracy

Mon Jul 21 16:15:15 UTC 2003

Taryn,

Can you provide some more detail on what you want this accuracy feedback
to look like in your specific case?   It would also be helpful to have
an idea of how you intend to analyze these results (i.e. to verify that
you have everything critical logged in a manner which makes it easy to
use other tools in or out of E-Prime to perform your analysis).

As you have described your setup, I would expect that each dependent
measure is being logged as different variables within a single trial
(which may or may not be what you want).

As per the feedback, it sounds like you will have to do something out of
the ordinary, but it's definitely do-able with a little script.   An
depending on what you need you may get by with just setting few
attributes and then using the feedback object to display the
information.  If you describe the type of feedback you want under
whatever scenarios you can think of and someone on the list will likely
be able to respond with more a more specific approach.

Regards,
Tony

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> -----Original Message-----
> From: Ben Staab [mailto:staab at Waisman.Wisc.Edu]
> Sent: Monday, July 21, 2003 10:58 AM
> To: Taryn Tacosa; eprime at mail.talkbank.org
> Subject: Re: feedback on accuracy
> 
> If you just need to give a mean of their accuracy, you should be able
to
> use @ACC.MEAN on your feedback display object.  If you need more than
just
> a mean, take a look at FeedbackDisplay.ACCStats in the E-Basic Help.
It
> returns a Summation object that provides different statistical
functions
> like standard deviations and such.  Otherwise, if you are trying to
show a
> chart of some sort with the accuracy for each letter in the sequence
> individually, that could be a little trickier.  It seems from some of
the
> things that I've tried doing in my own scripts, that E-Prime writes
the
> individual trial results to the log file and then throws them out.  So
you
> may have to keep track of them yourself by doing something like this:
> 
> 1. In the user tab of the main script window, declare an integer array
> with
> 16 slots, and a counter:
>          Dim MyArray(1-16) as Integer
>          Dim TrialsCounter as Integer
>          TrialsCounter = 1
> 
> 2. Put an inline script right after each letter is displayed that will
> insert the accuracy into  the array:
>          MyArray(TrialsCounter) = TheNameOfYourTextDisplayObject.ACC
>          TrialsCounter = TrialsCounter+1
> 
> 3. When all the trials have been completed (so make sure this is
outside
> your trialsproc, whatever you may have called it) add one last text
> display
> object (pick your own name, but I'm calling it SumText) with an inline
> script after it.  The script will look something like this:
>          ' Declare some position and a counter variables
>          Dim x, y, i as integer
>          x = 20
>          y = 20
>          i = 1
> 
>          ' print a simple header
>          SumText.Text x, y, "Accuracy Summary:"
> 
>          'Start looping thru the results.
>          'This displays results in two columns
>          For i = 1 to 16
>                  if(i = 9) then          ' if we've already displayed
8
> items,
>                          x = x + 50      ' move right to a second
column,
>                          y = 40          ' and move back to the top.
>                  else                    ' Otherwise,
>                          y = y + 20      ' move the y position down
>                  end if
> 
>                  'instead of showing 0 or 1, use english
>                  if(MyArray(i)=0)then
>                          SumText.Text x, y, "Trial " & i & ":
Incorrect"
>                  else
>                          SumText.Text x, y, "Trial " & i & ": Correct"
>          Next i
> 
> I think that should do it.  Lastly, a few caveats: I haven't tried
this
> myself; this is all off the top of my head.  So it's entirely possible
> I've
> got syntax and/or logic errors in there.  Also, those x and y
positions
> are
> just guesses on my part, change them as you see fit.
> 
> I hope that helps and that I didn't completely miss the point of your
> question.
> 
> Ben Staab
> staab at waisman.wisc.edu
> 
> At 10:14 AM 7/18/2003 -0500, Taryn Tacosa wrote:
> >Hello,
> >
> >I am having trouble finding a way to present accuracy feedback on a
> >sequence of observations. Specifically, a subject is shown a sequence
of
> >letters, one at a time, and responds YES or NO to each letter
(typical
> >n-back task). I would like a screen to give the subject feedback on
their
> >accuracy at the
> >end of each sequence, but am having trouble with this. So far, I can
only
> >get accuracy for the last display screen ONLY to appear, rather than
> >accuracy across all 16 observations (letters).
> >
> >Any help would be greatly appreciated!
> >
> >Taryn Tacosa
> >
> >>RA
> >>UNC-CH
> >
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