incremental adjustments of responses using key presses or mouse

[Yelda]

Dear group,

I know that this question was asked earlier (link is below) but I
couldn't manage to make the code work that was written by a responder
for a different program.

My task is as following: I want the participants to do resize a
randomly sized circle (I'll use "cnvs" function to draw the circle)
and then record the radius or diameter of the final size of the
circle. I can do this by either of the two ways below:

Mouse response: click on the circle and 'drag it' bigger or smaller

Key response: make the circle incrementally bigger or smaller
(preferably a pixel
at a time) by pressing up and down keys

I would appreciate any help.
Many thanks


http://groups.google.com/group/e-prime/browse_thread/thread/6e4c9ff8a36a3965/f61bd369d47a80f2

Yelda Semizer
Bogazici University, Istanbul, Turkey

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