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OSWeb Loop/Block Convertion not working properly.

Hi all,

I've made a project in OpenSesame, and it works great running locally. However, when I convert to OSWeb it does not work properly.

I have a big loop that will show 100 images in total. After every 20 trials the code will break to show a resting screen, then, it reenters the loop with a different type of image. So, basically, I have 5 blocks of 20 trials and each block is a different type of stimulus.

Running locally it works brilliantly. However, when running online only the first block is shown and the rest is only resting screens...

To clarify a little bit more, running the experiment I'm receiving something like:


Description of Block1

   Trial 1

   Trial 2




   Trial 20

Description of Block 2

Description of Block 3

Description of Block 4

Description of Block 5

End Screen


A Fixation Cross is showed before every trial.

I'm suspicious that the online version is not recognizing my break if statement, but....

My break if statement is: ([count_FixationCross]+1)%20 == 0 and [count_FixationCross] > 0

ps: I'm trying to upload the code for you, but I'm receiving the message "Request Failed with status code 413"




  • Main Loop contains a list of 5 blocks (N, W, T, A)

    And Block_loop contains 100 images

  • Hi @VictorVarela

    Break-if statements should work in (the latest versions of) OSWeb. Could you share your experiment by another medium, such as pastebin, so that we can have a closer look?

    To paste the experimental code, you can click the very first item in the overview area (with the OpenSesame item), click General script and copy the code.

    (Or you could try the upload function a couple of more times, perhaps it will work now.)



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  • Okay I guess this is what you asked for

    Thanks @lvanderlinden, as always :)

  • Hi @VictorVarela ,

    Unfortunately, the "resume-after" option is not supported in OSWeb yet. (So there's no problem with your break-if statement itself.)

    Is it absolutely necessary for your experiment to have the breaks? And for the trials to be completely random? (If not, you could create 5 blocks of 20 trials, of course).

    If the breaks and the random pulling are indeed necessary, I guess we should implement it in JavaScript. I can look into it, but I'm not particularly good with JS myself... ;)



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  • Dammit!!

    Well, at least now we know where the problem is... I will make it sequential if it is not yet implemented :(

    Thanks a lot @lvanderlinden

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