random positions for letters

[ashraf]

Hi peter
tbank you very much for your reply,my research about perceptual load,i
would like to send me your VB utility for scientific purposes.
ashraf

On Aug 9, 8:10 pm, Peter Quain <pqu... at une.edu.au> wrote:
> Hi Ashraf
>
> You probably have this sorted out by now, but
> after writing about positioning your stimuli
> using the canvas object (and Mich rightly
> pointing out that this might be a difficult
> solution to implement) I thought more about how
> this could be done, and worked out the (...one
> of  the :) algorithm. Anyway i've built a little
> VB utility that computes the x-y coordinates for
> different size native display resolution
> (640*480; 800*600 etc.) for the upper left
> corners of 6 squares (of side 'S') that centre on
> screen centred circumference at 60, 120, ... 360
> degrees of circle with radius 'r'.
>
> Let me know if it would be of any use and will send it along.
>
> You can run it on any computer and copy down the
> coordinates which could then be entered into the
> x / y properties dialogue of each of your slide
> objects, along with width, to situate them in
> clockface at correct degree. But, if you change
> the display resolution of the monitor you are
> going to be testing on to the resolution e-prime
> will use (set in experiment properties, but
> default, i think, at 640*480) and run the utility
> on that you can then adjust the size of the
> stimulus display very quickly, while measuring
> the elements in terms of the calculations you
> have done for visual angle relative to viewing
> distance. Then you'll get the correct coordinates to proceed.
>
> ~Peter
>
> At 06:54 PM 7/08/2009, you wrote:
>
> >Hi Ashraf,
> >         I believe at least two members of this
> > list have given you helpful suggestions about
> > what you write below. The question, however, is
> > what exactly is your problem about it? At the
> > moment, it sounds a bit like you want someone
> > else to programme the task for you, or that you
> > hope someone else already has programmed such a
> > task and is willing to share. If that is the
> > case, please spell that out, because as it is,
> > I might as well write a letter to the
> > GetBigBucks googlegroup list saying 'I want a
> > thousand bucks on my account tomorrow' - sure I do, but, so what?
> >         If you know the very basics of E-Prime,
> > it can't be too difficult to programme a task
> > in which you use a SlideDisplay, add 6
> > textdisplays to that, all in a circle, write
> > [L1] in the first ... [L6] in the last, use a
> > list with 6 added attributes (L1 to L6), and
> > just fill one of them, for every line, with the
> > specific letter in the specific position (say,
> > 6 positions x 26 letters is 156 cases, or use a
> > nested list with the letters so you merely have
> > 6). And so on. However, where exactly are you stuck in all this?
>
> >Best,
> >Mich
>
> >Michiel Spapé
> >Research Fellow
> >Perception & Action group
> >University of Nottingham
> >School of Psychology
>
> >-----Original Message-----
> >From: e-prime at googlegroups.com
> >[mailto:e-prime at googlegroups.com] On Behalf Of ashraf
> >Sent: 07 August 2009 00:37
> >To: E-Prime
> >Subject: random positions for letters
>
> >. I want to  make a circle of  six letters, (L1,L2,L3....TL.) and I want
> >to present target letter appears in one of
> >six possible positions in the  circle  . also the positions of other
> >letters is random
> >thanks
>
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