[solved] Hiding mouse cursor in touch screen IAT

MSumm · February 2015

Hello,

I've previously used OpenSesame to create touch-based IATs on Android tablets and it worked extremely well. Now, I am tasked with expanding the same IATs to a touch-based desktop lab. Everything works great, except that now the mouse cursor shows up on the screen when I don't want it to. Specifically, after making a selection, the cursor moves back into the center of the screen before the next trial begins (even when I move the cursor off the edge of the screen).

I tried using the 'legacy' backend, and this allowed me to move the mouse off the edge and it would remain there. However, according to the description of the backends, legacy should be avoided when precise timing is an issue (which it is in this case).

Is there anyway to suppress the cursor while using Xpyriment? If so, how?

Many thanks!

Matt

sebastiaan · February 2015

Hi Matt,

I'm assuming you use the touch_response plug-in, is that correct? Although there's is no visible option to hide the cursor, you can hide it by adding the following line to the script of the touch_response item:

set show_cursor no

Does that solve your problem?

I tried using the 'legacy' backend, and this allowed me to move the mouse off the edge and it would remain there. However, according to the description of the backends, legacy should be avoided when precise timing is an issue (which it is in this case).

In most cases, the timing offered by the legacy back-end is fine, even though it's slightly less precise than xpyriment and psycho. You can read more about this here:

http://osdoc.cogsci.nl/miscellaneous/timing/

Cheers,
Sebastiaan

MSumm · February 2015

This worked perfectly. Thank you so much!

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