feedback on accuracy

[Susan Campbell]

I'm going to make a guess, here, that may or may not be correct -- if it's
incorrect, this won't be useful.

It sounds like the procedure you're describing has 16 text/slide objects.
If this is the case, you have to specify which object the Feedback display
is getting its information from, and it's probably the last one.  This
would explain why you're getting only the accuracy from the last item.

If you're using this structure, it would probably be easier for you to use
script to gather the information into a summation object, which you could
then query for the mean, etc.  The upside would be that you'd only need
one inline, provided you're logging data from all of the text objects.

If you're using a procedure to display the 16 items, then the problem
probably has to do with it overwriting whatever you're trying to measure,
and again a summation object with addition at the end of each run of the
procedure would be helpful.

Hope this helps,
Susan

On Mon, 21 Jul 2003, Taryn Tacosa wrote:

> Thank you for the response. I will try to be more specific this time.
>
> What I would like this feedback screen to look like is actually very simple.
> Feedback is being presented for the subject's benefit only and will not be
> the focus of the analysis, though we are logging all response values
> (standard logging values are checked). Specifically, a subject sees a series
> of 16 letters one at a time and is required to make (1) response to each
> letter. This response is either correct (ACC=1) or incorrect (ACC=0). After
> the series ends, I want the subject to see: "You got ##% correct". So, if
> the subject answered correctly to 14 out of the 16 letters, he would see
> "You got 87.5% correct!".
>
> I have seen that the feedback object has "@ACC.MEAN" as one of its options,
> however, when I run the program using this (and citing the correct Input
> Object), the screen still gives accuracy for just the last response given
> (0% or 100%), rather than across all 16 responses. Is there something
> additional I'm required to do to enable this option to look at accuracy for
> all 16 responses?
>
> I am thinking it may be easiest to not use the feedback display and to just
> use a counter to record accuracies and then write a simple formula for the %
> on a TextDisplay screen. Any thoughts on this would also be appreciated.
>
> Thanks in advance for all input!
>
> Taryn
>