xpyriment and psychopy backend issues with tobii tx300

[hcuve]

Hi,

I was due to send this, which i also posted at the OS forum.

Basically, I found some problems using the xpyriment backend for my eyetracking experiment, using Tobii tx300 eyetracker.

first, the dimensions in which the calibration is presented in the screen as well as the entire experiment display in the screen seems off. I am using a 1024 x 768 display, and while the pygame backend displays both the calibration and the experiment in those dimensions, when using the xpyriment backend the calibration dots don't move all the way to the edges of these coordinates, instead they occupy a much smaller rectangle (if you were to draw one) and the same is true for the instructions in the experiment, even though the stimuli per se occupies the entire screen (1024x768) as it does with pygame. Also, the calibration only runs once, the validation is not shown, nor the results of the calibration, but I can see in the debug window that the calibration is usually unsuccessful when using this backend, while in pygame things go fine. As a result, my log files in xpyriment don't have any data, other than just the log messages. I can't quite get why is this happening.

A second issue is that when I look at the debug window while the experiment is running using the expyriment backend I get these warning] canvas.show() took 54.0 ms repeatedly. The issues above also apply to the psychopy backend, with an addition that for PsychoPy backend, video presentation which is part of my experiment appears not to work properly. I simply get a grey screen when the videos are supposed to be presented. I have tried converting my stimuli to a different format, and changing the display properties, and nothing. I get this grey screen as if something was playing, but you can't really see anything. Thank you! Helio

this is on windows 7, OS 3.2.5