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kri

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kri
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  • Hi Renato! I always wanted to turn a PsychoPy/Pavlovia experiment into a JATOS one. I'm sure it isn't to difficult - but I've never found the time to do it. Maybe now is the time :) Great idea to put everything in a Google Doc! Now to your question …
  • I agree with Elisa, if you redirect to a page outside of JATOS handling (your lab page), you cannot access any session data anymore (or only with some serious effort). I'd go with Elisa's proposal and add a last component as your lab page. But why w…
  • Hi! It's a know bug in 3.8.1 and it was fixed in 3.8.2. I recommend updating to the latest version which is currently 3.8.5. Best, Kristian
  • Hi! You can use jatos.waitSendDataOverlayConfigfor this. Best, Kristian
  • Hi Elena, experiments running on JATOS are shown to the participants in a browser. Users of browsers can download pictures with a right click and something like "save image". Participants can download and have access to the pictures. Best,…
  • Hi, great you found a way. I just want to add that when you export your result data from JATOS (one of the result pages) and use the "JATOS Results Archive" (the fist one in the dropdown list if you press on "Export Results"), th…
  • There is no limit in JATOS for the number of participants with the General Multiple link.
  • Hi! 1) JATOS itself does not limit the download of files (for whatever file type, e.g. audio, video). But limitations arise from other sources, mostly, the resources of the host machine where JATOS is installed, the internet connection of your parti…
  • Hi Mrockster, Since this seems to be more an issue with lab.js you can also ask in their forum. Best, Kristian
  • Hi Leo, This function jatos.urlQueryParameters should work in all JATOS components of the same JATOS study. E.g. if your URL parameter is called foobar you can access it in any component of this study with jatos.urlQueryParameters.foobar. But maybe …
  • Let us continue on GitHub issues: https://github.com/JATOS/JATOS/issues/298.
  • Hi Stephen! Which JATOS version do you use? There were problems like yours in older version that we (thought to have) solved. And actually there are differences in the browsers in regarding file download handling, especially between Firefox and Webk…
  • Hi Leo, Let me chime in here. It seems you are using the wrong version of Java. JATOS still needs 11 or 8. If unsure install the bundled version, JATOS with Java. Best Kristian
  • Hi! I'm too not sure why this happens with your study, but somehow it looks more like an issue with lab.js since you are able to access jatos.urlQueryParameters.Jatos_ID from the browser's console. Maybe your question is better asked in lab.js forum…
  • Hi! Nice you like JATOS (and its documentation) :) First I want to say, that it would have been better to open a new thread in this forum, since your issue is only remotely related to the current one. This way other people can easier navigate the f…
  • When I say I switched to a LAMP server, this is a default stack for setting up the server for general web use. I don't use PHP or MySQL for JATOS, they are just available on the server if needed. But if you don't use them then the LAMP stack is not …
  • previously I used a docker container Maybe you limited the memory consumption with the docker container then? When I upgraded to the new version of JATOS, I wanted to use a standard LAMP server. I'm confused, LAMP stands for Linux, Apache, MySQL, an…
  • I agree with Sebastiaan. For most usecases it is safe to "just" secure the server and not encrypt the database's data. Actually I've never encountered an encrypted database so far (although I'm not an admin). Best K.
  • Hi! Apparently this 'oom-kill' stands for "out of memory" and Linux decided to kill JATOS because the machine run out of memory. This line 10: 18571 Killed... is just the line of the loader.sh where JATOS gets started. Now the question see…
  • No, if you have terminal access to the server you can read everything in the H2 database. Use a MySQL or MariaDB for encrypted content. Best, K.
  • In addition to Elisa, I'd suggest to try out one of JATOS own example studies to rule out lab.js does something weird in the end of the study. Best K.
  • Hi! The embedded H2 database is not encrypted in JATOS. Although according to their docs it is possible. But, arguably, it is more important to secure the server where JATOS (with the H2 database) is running on and especially the connection to the …
  • Hi! I'm not especially familiar with PsyToolkit, but as far as I know you have to compile your PsyToolkit script (.psy file) into some JavaScript before you can run it in the browser. Then you can "jatosify" your JavaScript by following th…
  • Hi Riss, I'm glad you figured it out. In my experience this is a common approach, first store as much as possible because, hey, it's better to have data than not - and then reduce the submission because the server's resources aren't enough, the part…
  • Hi Riss! In my latest run of participants, I still encountered the issue where participants were waiting for the "submitting data" bar, to the point where some of them timed out, however, this occurred at a significantly smaller frequency …
  • There is a difference between JATOS and tools like PCIbex. While PCIbex tries to solve the whole problem of doing online experiments, including building and delivering it, JATOS just concentrates on the delivering part and leaves the building part t…
  • It would be wild if my server got hacked. I agree. I never had a JATOS server got hacked. Although I see in the logs a lot of attempts. We try to make JATOS as safe as possible and luckily JATOS is not a major goal for any hackers (I guess. Why woul…
  • Sorry Yoonah, for the late reply. I agree, if you do not encounter any problems while testing with a 3G connection, it looks like your server's resources aren't enough. Do you know the specs of your server? And, yes, fewer participants at the same t…
  • Hi Riss! Sorry to hear about your crashed server. Good that you had your data saved before. But it's difficult to say what happened to your server. Servers crash sometimes. DigitalOcean has an uptime guarantee of 99.99%. The weird thing in your case…
  • Hi Yoonah! About your first question, the invalid data one, my first thought is that you result data are too large for your participants Internet connection or your JATOS server. JATOS shows this "Transferring data" pop-up at the end of an…

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