Incremental adjustments to participant's response

[Alex Marchant]

thanks Chunhui for your speedy reply. I'll give it a go.

Alex

On Nov 19, 2007 7:06 PM, chen <chunhuichen at 126.com> wrote:

>
> Hi, I don't konow how to draw circles, but i had wrote a program to change
> the fontsize automaticlly, maybe similar to your second question.
>
> "make the circle incrementally bigger or smaller  (preferably a pixel
> at a time) by pressing a button, and then logging the final size."
>
> below are codes showing what I had done in my program, I just type in, not
> debuged yet, just showing the main idea.
> dim again as long
> dim radius as long
>
> again=1
> radius=10
>
> while again
>    cnvs.Circle 640, 512, radius  ' in my original program, it's a
> textdisplay object
>                                  ' presenting a word, if there is a
> response, the object
>                                  ' will disappear, Which object can draw
> circle?
>    if object.response="a" then
>          again=0                 ' press "a" then finish
>    elseif object.response="b" then
>          radius=radius+1         ' press "b" darw larger circle
>    else
>           radius=radius-1         ' press other key draw small circle
>    endif
> wend
>
>
>
> --
> Chunhui Chen
> ______________
>
> Beijing Normal University
> &
> University of California, Irvine
>
> 在2007-11-20，"alex.marchant at gmail.com" <alex.marchant at gmail.com> 写道：
>
> Dear E-prime group,
>
> I believe a question like this was answered back before the group went
> onto google (I dimly remember something to do with adjusting the
> length of a line), but I've lost a lot of my past messages and so
> can't dig it out.
>
> I want to get participants to either...
>
> click on a circle and 'drag it' bigger or smaller, and then record the
> final 'resting' size of the circle
>
> or...
>
> make the circle incrementally bigger or smaller  (preferably a pixel
> at a time) by pressing a button, and then logging the final size.
>
> At the moment I'm using E-prime to draw my stimuli. So something
> like...
> cnvs.Circle 640, 512, c.GetAttrib("TargetSize")
>
> Where the '640' and '512' are coordinates and the
> 'c.GetAttrib("TargetSize")' is the radius of the circle.
>
> Any help would be greatly appreciated on either or both (if you have
> the time!) questions.
>
> many thanks
>
> Alex Marchant MSc
> Goldsmiths, University of London
>
>
>
> >
>

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