Animation sequence freezes during specific trials using MindProbe server

PazBarTal

Hello everybody,

I'm running an experiment presenting frame sequences (20 frames displayed for 100ms each) using the jspsych-animation plugin. When I use an external server (i.e., MindProbe), the sequence occasionally freezes during random trials (approximately 1 from 15 trials), especially in the beginning. Each figure is between 550 to 650 KB. I tried to force the browser to use the GPU for rendering instead of the CPU using this code in the style section in my code:

img {

will-change: transform;

transform: translate3d(0, 0, 0);

}

I also use jsPsych.pluginAPI.preloadImages for each trial to not overload the server (although I tried in addition to also preload all the images together using this code:

  fetch("image_list.json")
      .then(response => response.json())
      .then(images => {
          jsPsych.pluginAPI.preloadImages(images, function () {
              console.log("All images preloaded.");
          });
      });

which helped a little bit but didn't solve the problem).

Has anyone encountered similar issues or can suggest debugging approaches?

elisa

We seem to have missed this message, apologies. However, it sounds like a frontend (i.e. jsPsych) problem. I would suggest you ask in their forum