Image preloading - experiment failed to load

[synapticlee]

jspsych 6.1.0

Hi, I'm trying to preload 30 stimuli, and I'm doing this by calling a .js script called stimuli.js at the top of my HTML, which loads a var called images.

I'm then trying to preload these with,
jsPsych.init({
timeline: timeline,
preload_images: images,
on_finish: function() {
jsPsych.data.displayData(); // comment out when live
}
});

And nothing else. However when I run the experiment it says "the experiment failed to load". I only have 30 stimuli, so I'm not sure why this is a problem. Can anyone help?

I decided to preload as some of my stimuli were showing up with a broken link image when testing my experiment.

[jodeleeuw]

Hi @synapticlee,

If you are getting a broken link image running the experiment this indicates that the path to the image file is incorrect. This would also explain why the experiment is failing to load: if there are files that cannot be found then preloading will fail. If you open the developer tools and/or console in your browser, you should see error messages for each failed image load and that will help you track down which paths are incorrect.

[synapticlee]

Hi, that's why I'm confused as the stimulus path that shows up in the JSON at the end of the experiment is correct. Is there any other reason this could be happening?

…

On Tue, 24 Jan 2023, 16:28 Josh de Leeuw, ***@***.***> wrote: Hi @synapticlee <https://github.com/synapticlee>, If you are getting a broken link image running the experiment this indicates that the path to the image file is incorrect. This would also explain why the experiment is failing to load: if there are files that cannot be found then preloading will fail. If you open the developer tools and/or console in your browser, you should see error messages for each failed image load and that will help you track down which paths are incorrect. — Reply to this email directly, view it on GitHub <#2948 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABJA4PSRTE3YPXVIRMJWB3LWUBCP7ANCNFSM6AAAAAAUFLJKY4> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[jodeleeuw]

Very unlikely that it is another reason. Are there errors in the developer console? There is probably a typo or small difference in one or more of the filenames that is causing the issue.

[synapticlee]

There are no errors in the developer console and I've triple checked that the stimulus is there, even deleting it and putting it back in the same folder

[synapticlee]

I remade the stimulus in photoshop and somehow it works now..