[Solved] Adding a break after each randomised block - Run for all main blocks except the last one

Comments

• Fab

  March 2022

  Hi @apodim,

  I couldn't download your task (for some reason, my antivirus blocks it) but based on your description, couldn't you add the break (e.g., a sketchpad instructing subjects to take a break) within the experiment_loop and insert [block_number]<3 as the "Run if" condition? That should ensure that the break runs after blocks 1 and 2, but not after block 3.

  Does that help?

  Fabrice.

  
• apodim

  March 2022

  Hi @Fab ,

  Thanks for taking the time to answer!

  The problem is that

  the blocks are not presented in sequence but they are randomised in the experiment loop through the block_number variable. So block 3 might come first, second, or third.

  Sorry about the task being on a hoster. I tried to upload it here several times but it keeps failing. Maybe the antivirus does not like its extension or the website it is hosted on. I am uploading it again on send (fork of the now defunct firefox send).

  https://send.vis.ee/download/b7063779de97f4b3/#4aD-2iCsNF64O52-hLmDGg

  
  
• Fab

  March 2022

  Hi @apodim,

  Ok, now I get it (I thought that your block_number variable was actually a counter).

  Ok, so what you want to do in your case is indeed to implement a counter that gets incremented every time your block_sequence runs. It's actually easy to do. Since you're using javascript code instead of Python, I implemented the solution in Javascript.

  Here's the logic:

  

  (1) you set up a variable (I called it blockcounter) to 0 at the onset of the task:

  vars.blockcount=0
  

  (2) you increment that counter by one unit every time the block_seuqence runs:

  vars.blockcount++
  

  (3) you make sure that whatever sketchpad etc. you're using to implement the break in the task is set with a Run if condition : [blockcounter]<3.

  That's it! Try it out. It should work. You can download my modification here:

  https://www.dropbox.com/s/7p0whmjldjz33bh/AXB_Experiment%20Fab.osexp?dl=0

  Hope this helps!

  Fabrice.

  PS: I think the forum doesn't let you upload the task directly because it is greater than 1Mb in size.

  
• apodim

  March 2022 edited March 2022

  Hi @Fab,

  Forgot to tell you that it works like a charm. It even inspired me to write a snippet to calculate accuracy.

  Thank you very much!

  Dimitrios
• Fab

  March 2022

  @apodim

  Hi Dimitros,

  Great, glad it's working!

  Good luck with your experiment!

  Fabrice.