X position

[gilis]

Hi All,

In my Experiment the stimuli appear, technically, twice. The
participant however is very desirably not to notice that. The issue is
that I collect one vocal response and one manual response (with the
mouse) so there are two following slide objects that present the same
stimuli exactly.

The problem I now facing goes like that: Most of the images I use are
at the same size and I use flankers above and below them in part of
the trials. The flankers should always appear above or below the
center of the image.

Two of the images are too large so I had to move the flankers to the
left  in oreder of these to appear above the center of it exactly.

I did it by setting an attribute dubbed "Location" in the trial list-
for all other images its value is "center" and for  these two images I
set the value to 55%.

In the slide objects that contain the stimuli and the flankers I
changed the flankers X position only (X and X align, in the sub object
properties)  by adding [location] to both X and X align. The problem
is that the program automatically change it to [Location]:center. I
have tried several times to delete the "center" but for vain because
then it add it time and again.

What I get in my experiment is that for these two images there is a
movement and it can be noticed that I'm using to slide objects. The
first object present the flankers at the [location] and the second at
the center...Also, although the image is set to allways appear in the
center from within the sub object properties, it seem to move the same
way with the flankers.


Does any one have anhy idea what may be causing it?

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