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Possible to replace running experiment by updated one without changing the link?

Hi,

I am rather new to OS and Jatos. I use both to collect data for my thesis and came across the following problem:

I started an experiment in Jatos and already got a lot of responses I don't want to lose.

Problem was, I later realized there was a problem with the lists, the experiment obtains the stimuli from. I managed to solve that problem and now I have an updated version of my experiment, which I would like the future participants to take part in.

As I already sent out a lot of invitations, is there a way to exchange the experiment versions without having to change the link that opens the experiment for the participants?

It would be fantastic if anybody could help me with this!

Thanks a lot!

Nina

Comments

  • Hi Nina,

    The short answer is yes: you can simply re-upload your study, replace to old files in JATOS, and the old links will point to the new version.

    However this depends on that both your studies have the same UUID (you see that in your study properties). With the same UUID, JATOS will realize that you're importing another version of the same study and ask you if you want to overwrite (click yes in all cases). I don't know how OSWeb works here, and how you created your new version. If you modified the code you had, you'll probably export a study with the same UUID. If you started a second study from scratch, you'll get a different UUID. Then you'll have to go into the zip files and modify the contents by hand.

    Best

    Elisa

  • Hi,

    I have a question which is closely related to the one already asked:

    I first tried to upload a new version of the experiment already running because I didn't want it to interrupt. However, if I understand your answer correctly, the data which were already saved will not be overwritten. Is this correct? Will all my other settings stay in this case (e.g. different batches with different properties)? Is there any way apart from the "Start Time" do distinguish which version of the experiment participant saw when clicking on one of the already sent out links?

    Furthermore, even though I created a new experiment folder with a slightly different name and even though the html-files have slightly different names in the updated version, I receive this warning:


    If I do not want to overwrite my existing study (which is the one caleld Online_PWI_II) but instead want to have a slightly different one additionally, what should I do?

    Best,

    Anne

  • edited October 22

    Hi Anne, you have several questions, see below:

    if I understand your answer correctly, the data which were already saved will not be overwritten. Is this correct?

    Yes, that's correct. However, I would recommend you always back up your data before changing anything in the study. I recommend you download what you have already. It will take no time, and you might save yourself a headache.

    Will all my other settings stay in this case (e.g. different batches with different properties)?

    Yes, that will also remain. So if on your server you have a study with two batches (e.g. "Piloting" and "Testing") and you have exported from your local JATOS a study with only one batch (e.g. "Piloting"), then the "Testing" batch and all its properties will remain intact, but any modified properties in the "Piloting" batch will be overwritten. If you have both batches in the study you're importing, then both batches will be overwritten.

     Is there any way apart from the "Start Time" do distinguish which version of the experiment participant saw when clicking on one of the already sent out links?

    Not built in. You could add to your result data a flag like ExperimentVersion that gives you the information you need.

    Furthermore, even though I created a new experiment folder with a slightly different name and even though the html-files have slightly different names in the updated version, I receive this warning:

    Yes, that's because JATOS considers two studies to be the same if they both have the same UUID (universally unique identifier).

    If I do not want to overwrite my existing study (which is the one caleld Online_PWI_II) but instead want to have a slightly different one additionally, what should I do?

    Changing the name (as you noted) won't work. Instead do the following:

    • On your local JATOS, go to your new (modified) study and then click More -> Clone.
    • This will create a clone, with a different UUID. This is now a different study, from JATOS' point of view. Rename the study and study folder as you wish.
    • Export and import to your server.

    Hope this helps

    Elisa

  • Thanks for your answer, this really helped to clearify a few things!

    Anne

  • Hello everyone,

    I have a question related to this topic. I am conducting an OSWeb study on JATOS but I need to change some part of the experiment. I don't want to lose the results data of the previous participants because in the end, I want to download all results as a single file. I used web interface to create and run the experiment so far, however, I couldn't find a way to replace the main experiment file without changing anything else. Isn't it possible on web interface?

    Thanks for your help in advance.

    Best regards,

    Jonah

  • Hi Jonah,

    This is possible.

    First, I would recommend you anyway download your data before changing the experiment. I understand you want to download it all together but it's always safer to have a backup copy in (the unusual) case that something goes wrong when you update your study.

    Each study created in JATOS (or in OSWeb) has something called UUID (which you see in the Study properties). This is a unique identifier, and this is what JATOS uses to know if two files correspond to the same study or a different one. If you simply import to the same server a modified version of your previous study, you'll get a prompt asking you which aspects you want to overwrite, and that's it.

    I am not too familiar with the OSWeb pipeline but you should be able to take your old study, modify it in OSWeb, export it as a JATOS .zip file, and import it again. If that leads to a different UUID, you'll have to unzip the folders and replace files. I can guide you through the steps.

    Best

    Elisa

  • Hi @elisa ,

    Thank you very much for your response! I was actually trying to manually change the zipped file that I uploaded and JATOS was assigning a new UUID in that case. However, it worked when I apply the changes on the file that I exported from the JATOS, I managed to overwrite the study.

    Thanks a lot!

    Best regards,

    Jonah

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